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Robby

@greerreNFL

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NFL analytics & prediction || betting models available on

California, USA
Joined September 2017
Don't wanna be here? Send us removal request.
@greerreNFL
Robby
4 months
It’s 4th and 16 Would you rather complete an 8 yard pass with 0% probability of a first down Or Chuck it deep into the end zone and risk an INT Congratulations, you now understand EPA, and why Allen’s 18 interceptions are not that big a deal
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@greerreNFL
Robby
4 months
Imagine the Jordan v Lebron debate if Lebron was 0-2 against Wizards era Jordan in the playoffs
@TheVolumeSports
The Volume
4 months
"What if in 30 years, we view Brady as Bill Russell?" — @ColinCowherd and @getnickwright discuss the 'count the rings' argument
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@greerreNFL
Robby
3 months
“Bill Russell has the most rings. Was he better than Jordan or Lebron?” My friends, Brady has: •The most rings •The highest peak •The longest prime He is Russell, Jordan, and LeBron COMBINED
@greerreNFL
Robby
3 months
It’s hard to argue that Mahomes isnt on the best trajectory of any QB ever But to say he’s already eclipsed Brady presupposes a level of late career success only achieved by one dude so far In my opinion, it’s a convo at 6 and a debate 7
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@greerreNFL
Robby
3 months
Some count rings, others count units 🐐
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@greerreNFL
Robby
4 months
Despite Allen’s 18 INTs, he cost his team less EPA and WPA on INTs per drop back than the average starter Allen was situationally aggressive, which is exactly what you want your QB to be Is he the best at protecting the ball? No, but in context, the INTs were not that costly
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@greerreNFL
Robby
3 months
Hard to understand the hate Shanahan is getting after the Super Bowl There were 7 fumbles in this game and KC recovered 6 (six!) of them Sometimes it just doesn’t break your way…
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@greerreNFL
Robby
8 months
Folks, the Bills might be very good this year...like, very very good
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@greerreNFL
Robby
3 months
It’s hard to argue that Mahomes isnt on the best trajectory of any QB ever But to say he’s already eclipsed Brady presupposes a level of late career success only achieved by one dude so far In my opinion, it’s a convo at 6 and a debate 7
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@greerreNFL
Robby
1 year
There is not an elite QB in the last 20 years that has gotten less defensive help than Patrick Mahomes ( also Brady getting substantially more help than Manning is a myth 🤫)
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@greerreNFL
Robby
6 months
It's a shame our Josh Allen MVP futures are cooked because he's having the best season of any QB 1st in Win Probability Added 2nd in Total EPA 3rd in EPA / Dropback Oh and the interceptions? He lost 0.01 EPA / drop back *LESS* than the league average on interceptions
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@greerreNFL
Robby
3 months
On playing from behind, here are all instances since 1999 where... QB took the field with: ‣ Under 5 minutes ‣ Down by 8 or less ‣ Win probability <50% And left the field with: ‣ Win probability >50% on their last play OR ‣ Their team tied or took the lead
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@greerreNFL
Robby
5 months
Because Dak and Allen were slotted for wildcards most the season, a narrative formed that they were ineligible for the MVP Now that they have the stats *and* the seeding to be MVP, what’s the excuse?
@benbbaldwin
Computer Cowboy
5 months
Final (regular season) quarterback grade and efficiency Allen-Dak-Lamar finish 1-2-3 in grade Purdy-Dak-Allen finish 1-2-3 in EPA per play
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@greerreNFL
Robby
5 months
Josh Allen led a 4th quarter drive that tied or took the lead in 4 of the Bills 6 losses In no games did he lose a 4th quarter lead on a turnover Not all MVP candidates can claim the latter…
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@greerreNFL
Robby
8 months
A glorious chart for Cowboy fans. Currently on pace for the best Net EPA / Play ever
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@greerreNFL
Robby
6 months
Josh Allen has lost fewer points on interceptions than Mahomes, Dak, and Hurts send tweet
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@greerreNFL
Robby
3 years
Not sure entirely why I decided to make this, but I think a lot of the "what is EPA" explainers don't use enough data viz to build intuition for the stat and don't explain it as an accounting framework for analysis rather than a stand-a-lone metric
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@greerreNFL
Robby
11 months
Fool me once, shame on you
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@greerreNFL
Robby
3 months
A good rule in data — increasing sample isolates signal by smoothing random noise “QB Wins” is a function of: - QB (signal) - Team (noise) - Opponent (noise) - Luck (noise) QB Wins: 1 Game = not a QB stat 1 Season = not really a QB stat 1 Career = very much a QB stat
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@greerreNFL
Robby
4 months
What EPA cannot tell us is whether or not there were alternatives available For instance, in Week 18 there was a clear 1st down in the flat that he passed up for an end zone shot that resulted in an INT You need film to see that…but he was also 1st in PFF grading, so…
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@greerreNFL
Robby
4 months
Not exactly -- Brady and Manning both reached the heights Mahomes has achieved In fact, Brady is the one with the "highest peak" What's different about Mahomes is that he started his career at Brady and Manning's peak level He's Marino, but with rings
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@ASchatzNFL
Aaron Schatz 🏈
4 months
There's going to be a lot of talk in the next 2 weeks about whether Patrick Mahomes is the GOAT. I liked the Bill James Historical Baseball Abstract because he ranked players two ways: peak and career. I think it's clear Mahomes has passed Brady and Manning as the Peak GOAT.
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@greerreNFL
Robby
6 months
This play is a great example as to why "deep accuracy" should be thought of as more a function of the receiver than QB Tua's ball goes over the wrong shoulder, Hill adjusts, gets under the ball and catches it for a 60 yard TD Average receiver does not catch this ball
@NFLonFOX
FOX Sports: NFL
6 months
TYREEK HILL IS NOT HUMAN... another 60+ yard TD for @cheetah ! 🐬 📺 FOX
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@greerreNFL
Robby
9 months
Super Bowl winners (since '99) sorted by the average yards per season their top 3 receivers generated in the seasons after the Super Bowl Nothin to see here 🐐
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@greerreNFL
Robby
5 months
Top 11 QBs by total EPA, along with the breakout of where they are generating / losing EPA vs the league average
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@greerreNFL
Robby
5 months
The Bills have 90% chance to make the playoffs Between the injuries, fired OC, and off field controversy, where would this team be without Allen, who has *cooked* all year By any serious measure, he is the MVP
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@greerreNFL
Robby
2 years
Amazing that we can declare going for it on 4th down bad strategy after 5 attempts, but we can’t declare running on 2nd and long bad strategy after its resulted in no fewer than 1 trillion punts two plays later Punts are turnovers too
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@greerreNFL
Robby
10 months
Right on schedule
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@NFLNotify
NFL Notifications
10 months
𝗥𝗘𝗣𝗢𝗥𝗧: Justin Fields is currently the most bet on player to win MVP on PointsBet. He has more MVP bets than Mahomes, Allen and Herbert combined 📈
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@greerreNFL
Robby
7 months
Here are the 5 QBs who benefit the most from YAC (on an EPA / play basis) Great play calling and scheme can really elevate QB production
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@greerreNFL
Robby
2 years
This is quite interesting EPA / Dropback has the highest correlation to margin of victory, but... ANY/A and Passer Rating have a higher correlation than QBR, QB Elo, and PFF Grades
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@greerreNFL
Robby
1 year
Zach Wilson is playing on borrowed time 3rd worst QB *ever* by Era Adj. Elo per Game QBs this bad typically do not make it to 20 starts -- Wilson is at 22
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@greerreNFL
Robby
2 years
Continuing to explore home field advantage and found three additional factors worth adding to a model: * Influence of field surface --> worth more than a bye * Asymmetric nature of byes --> away benefits more * Relative timezone advantages --> it's not just a cross country thing
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@greerreNFL
Robby
4 months
@alffridsen See, you get what we’re doing here! Is this a real take? Of course not. Maybe. I don’t know
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@greerreNFL
Robby
7 months
MVP often goes to a QB in the top 3 in Total EPA Josh Allen is essentially tied for 1st in Total EPA and currently has the 6th best odds at ~+1800 The narrative around the Bills is crazy
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@greerreNFL
Robby
6 months
"The Bills are losing because of Josh Allen's turnovers" Actually, he's hurt his team less with turnovers than the current MVP front runner🤷‍♂️
@josephjefe
Joseph Hefner
6 months
How much are turnovers caused by the QB hurting your team overall? This is every interception + fumble lost by a QB for each team, and the sum total of Win Probability that has been lost by each team from them. Top right means few interceptions, and not much pain.
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@greerreNFL
Robby
4 months
Is the KC offense really fixed or did they just play the two most depleted defenses in the NFL before only putting up 17 in the AFCCG? Is the 49ers’ defense really a liability or did they just play two of the hottest offenses in the league? Hard to say 🤷‍♂️
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@greerreNFL
Robby
5 months
In 2024, let's make a collective resolution to minimize the amount of toxic QB discourse on this app For instance, here is a chart celebrating Jordan Love's first season as a starter Nice job Jordan!
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@greerreNFL
Robby
5 months
Not quite the “same guy”
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@greerreNFL
Robby
4 years
How to use market regression to predict NFL games more accurately than the market itself
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@greerreNFL
Robby
3 months
Toss in a missed XP, a shot to close out the game on 3rd and short, a shot to end the game on 4th and 1, etc etc These games come down to the narrowest of margins Being a play away from a SB win is about all a coach can do He’s one of the best in the league
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@greerreNFL
Robby
8 months
Fool me once, can't get fooled again
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@greerreNFL
Robby
11 months
Fool me once, shame on you
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@greerreNFL
Robby
4 months
Yeah man, Brady totally sucked when he no longer had “Kraft, Belichick, and the ‘culture’”
@TheVolumeSports
The Volume
4 months
"What if in 30 years, we view Brady as Bill Russell?" — @ColinCowherd and @getnickwright discuss the 'count the rings' argument
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@greerreNFL
Robby
2 years
The most offensive points scored over a 3k play stretch is 1221 by the '18 - '20 Chiefs The fewest offensive points scored over a 3k play stretch is 504 by the '10 - '13 Chiefs
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@greerreNFL
Robby
4 months
I must also add, this was not meant to be anti-Tua, who I think is being very under-appreciated at the moment… While I don’t think he’s as good as the true believers, he’s a really good player and I’m sure he made what he thought was the best throw available to him Absurd to
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@greerreNFL
Robby
1 year
‘22 Herbert highlights the biggest limitation of EPA as a QB stat No counterfactual When no one’s open downfield and Herbert navigates a broken pocket to avoid a sack and hit a check down for a gain of 2…he gets negative EPA EPA has no context for what an avg QB would do
@theStevenRuiz
Steven Ruiz
1 year
Think about how well Herbert is playing tonight. This is his epa.
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@greerreNFL
Robby
3 years
Era Adjusted QB Elo is now live on the QB rankings page! This tool allows you to compare any 5 QBs from across the complete history of the NFL
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@greerreNFL
Robby
1 year
Yo is Mike McCarthy a Hall of Fame Coach? Since 1999 he has... • 4th most wins • 3rd most playoff appearances • 8th best average margin of victory • a Super Bowl Ring
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@greerreNFL
Robby
1 year
Ryan Leaf does not impress me Zach Wilson does not impress me Johnny Manziel does not impress me JaMarcus Russel does not impress me Trent Dilfer? He impresses me
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@greerreNFL
Robby
2 years
Do you ever think about how Over Expected metrics (CPOE, RYOE, etc) are just model error terms And then what does it mean to assign 100% of the model error to a single omitted variable (QB, RB, etc)
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@greerreNFL
Robby
6 months
For the “EPA is a team stat, you have to watch film” crowd… EPA has the highest correlation to PFF grades of any stat based QB metric (they’re all pretty close) Are we all just big dummies for looking at stats?
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@greerreNFL
Robby
1 year
@NemoJNobody It shows that there has been no better offense for a sustained period of time than the one quarterbacked by Mahomes
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@greerreNFL
Robby
4 months
@LaBen_27 Per drop back, Allen cost his team less in EPA and WPA on INTs than the average starter The number of INTs thrown matters much less than when those INTs are thrown
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@greerreNFL
Robby
4 months
@Humbleobserver8 For sure. The broader point is that all plays occur in a context, which EPA helps us understand Risk taking is not a bad thing if the situation calls for it
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@greerreNFL
Robby
4 months
Hopefully you all aren’t taking this too seriously
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@greerreNFL
Robby
1 year
Analytics
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@greerreNFL
Robby
3 years
"Defensive regression" is a partial misnomer that can be confusing A defense's performance is largely dictated by who they're playing It's not just that the players on the defense regress, but rather, the quality of QBs they face regresses to the mean
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@greerreNFL
Robby
3 years
Yo this is cool -- most accurate models by mse
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@greerreNFL
Robby
4 years
Pinning a single thread with all the analysis, code, and findings from this account New work will be added as it’s released 👇
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@greerreNFL
Robby
5 months
I’ve been told EPA is *strictly* a team stat So imagine my surprise when I found out 8 of the 10 teams with the largest improvement in team EPA had a material change at QB
@tejfbanalytics
Tej Seth
5 months
offenses that improved the most from last season to this season (using the EPA/play difference): 1. texans, 0.14 <- 2. colts, 0.13 <- 3. rams, 0.13 4. 49ers, 0.10 5. ravens, 0.08 6. cowboys, 0.07 7. dolphins, 0.06 8. buccaneers, 0.05 9. packers, 0.05 10. broncos, 0.04
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@greerreNFL
Robby
4 years
This offseason, I've been trying to improve the weighted EPA model to get it production ready for 2020 One weight consistently surprised me was the overweight for air yard EPA on completed passes This sparked a very fun project that I'll be writing up soon. Here's a preview 👇
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@greerreNFL
Robby
3 years
More interesting stuff coming out of the QB model build... Predicting QB performance in an effort to predict a game outcome means you should be predicting the metric that most closely aligns to *margin of victory* EPA / Play seems best here
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@greerreNFL
Robby
10 months
It is done QB Elo model re-written (w/ some improvements) and pipelines created to have this run each week w/ just a bit of manual work for updating starters Next step is to turn it into a repo where the CSV can be shared in the same format as the original 538 file
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@greerreNFL
Robby
11 months
Damnit. So sad 538's Elo was the original framework for nfelo and I still use their QB adjustments Which leads me to my next question... Anyone want to try to keep this project going?
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@greerreNFL
Robby
7 months
The Vikings negative variance / mean reversion this season is even funnier than you’d think They are are one of just 3 teams that have recorded a PFF team grade you’d normally expect to result in a win in all 6 of their games
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@greerreNFL
Robby
8 months
Since rush attempts have a negative expected EPA, it's hard to measure RB performance with it Well, what if we made a model that predicted EPA, measured who exceeded expectation the most? Let's call it rbEPA Here are the top 15 in total rbEPA since 2006
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@greerreNFL
Robby
8 months
The 2021 draft class was supposed to be one of the best ever for QBs It set a record for the most QBs selected in the first 3 rounds Well, it's turning out to be one of the worst of the last decade
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@greerreNFL
Robby
3 months
@BeanEnjoyersCEO Brady’s peak will surprise you!
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@greerreNFL
Robby
9 months
Jimmy Garoppolo EPA by team: LV: 046 NE: 0.41 SF: 0.20 (3rd in the NFL from '17 - '22) It's time we ask ourselves the important questions -- did Kyle hold Jimmy back?
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@greerreNFL
Robby
1 year
Last season, the Chiefs had the hardest projected schedule of any team since 2003 It ended up easier than 81% of the schedules over the same period 🤯 These teams were all way worse than expected: • Broncos x2 • Chargers x2 • Raiders x2 • Rams • Cards • Bucs • Colts
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@greerreNFL
Robby
5 months
Jags last 4 drives made it to: Baltimore 32 > missed FG Baltimore 36 > missed FG Baltimore 23 > Fumble Baltimore 5 > Time expired Spectacular
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@greerreNFL
Robby
5 months
The updated Fields/Trubisky chart
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@greerreNFL
Robby
11 months
Fool me once, shame on you
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@greerreNFL
Robby
3 months
@steven64893723 I will not entertain an insightful and well reasoned take like this Not on here. Not on twitter
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@greerreNFL
Robby
1 year
Tom Brady and Aaron Rodgers do not impress me The 5 worst QBs to win a SB? They impress me It’s easy to win when you’re good, but have you ever tried being not good
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@greerreNFL
Robby
4 months
Number of Super Bowl appearances vs the number of seasons required to reach them Mahomes is only the 3rd player to get to 4 in 5 or fewer seasons (Kelly and Brady) Also, Brady's 2014-2020 probably not talked about enough-- 7 seasons, 5 appearances, and 3 rings
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@greerreNFL
Robby
1 year
In Belichick’s Football Life doc, there’s a clip of him chatting w/ Brady before the Titans blizzard game Belichick: “how’s this look?” Brady: “oh man, this is a QB’s dream right here” Belichick: “yep, they’ll never rush in this” Brady threw 5 TDs in a single quarter
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@greerreNFL
Robby
7 months
Even after the losses, the Bills and 49ers are still pretty close to the mark for best net EPA since 2009 (which was the '19 Ravens)
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@greerreNFL
Robby
1 year
Like any good analyst, the first question I always ask myself before cracking open my laptop is: “How can I use data to ruin the sport for everyone else”
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@greerreNFL
Robby
5 months
Bills and Pats have combined for 20 points and negative 8 passing yards through 13 minutes of football Incredible
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@greerreNFL
Robby
5 months
How well various metrics predict future PFF grades based on the size of the sample used Every time I look at metrics for QBs, ANY/A is surprisingly awful. Just use Passer Rating
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@greerreNFL
Robby
3 years
QB aDoT by itself is *terrible* metric for measuring QB performance Using it that way is not "analytics" Using it to dunk on QBs with low aDoT is beyond dumb
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@greerreNFL
Robby
3 years
Dak is 89th percentile through 77 games. Almost all QBs with this profile ended up as HOFers
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@greerreNFL
Robby
2 months
Top 5 Winners and Losers in Super Bowl Odds from Feb to March Free Agency has less impact that you might expect
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@greerreNFL
Robby
3 years
If you're still assuming 2.5 for home field advantage in the NFL... HFA has been: 0.13 season to date 0.49 over the last 3 seasons 1.32 over the last 5 seasons 1.94 over the last decade
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@greerreNFL
Robby
3 months
2024 MVP Probability vs Team Super Bowl Probability Feels maybe a touch disrespectful to Purdy 🤏
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@greerreNFL
Robby
8 months
This is so disrespectful
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@greerreNFL
Robby
8 months
What’s a worse sign for a pass defense?
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@greerreNFL
Robby
3 years
Ok, this is wild KC is 18th in net epa, has negative net epa on a rolling 250 play basis.....but is ranked *3rd* by WEPA, which weights epa to strip out things that are less predictive (turnovers, defense, etc) Would not bet against this team in the 2nd half of the season
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@greerreNFL
Robby
9 months
I sincerely appreciate that Ruiz doesn't just stack rank on recent performance like 99% of rankings If you've ever looked into modeling QB performance, you'd see how impactful QB-independent circumstance is on raw stats and team outcomes This list is good
@theStevenRuiz
Steven Ruiz
9 months
The internet's favorite QB rankings are back. I'll give it away: Patrick Mahomes is no. 1 away but you have to click to see the rest of them. We've made a couple of small tweaks to the grading and presentation. Excited for you guys to check them out.
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@greerreNFL
Robby
9 months
nfelo has been updated for the 2023 season This uses the new QB model and introduces Win Total ratings as part of the ensemble that sets pre-season ratings (very small improvements) The QB ranking and Power Ranking pages will update after week 1
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@greerreNFL
Robby
3 months
The number of people believing I made up a stat called “unit” just to support Brady has left me speechless Speechless, and inspired to create a stat called unit
@greerreNFL
Robby
3 months
Some count rings, others count units 🐐
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Robby
1 year
How many times have Brady, Manning, and Mahomes gone under on their season win total? FOUR Dating back to 2003 when the database starts, these QBs played 36 seasons and ~collectively~ went under just 4 times 🐐🐐🐐
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@greerreNFL
Robby
2 years
Here we go again...
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@greerreNFL
Robby
4 months
@maestroxv_ I’m just a hobbyist sharing my opinion, which is: The Allen INTs, while not ideal from a result perspective, are vastly over emphasized, and don’t come close to negating all the other stuff he does exceptionally well
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@greerreNFL
Robby
1 year
NFL scheduling is genius Strength of team correlates with strength of schedule Bad teams get easier schedules, good teams get harder schedules This keeps the season engaging for longer
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@greerreNFL
Robby
2 years
The roar, as it turns out, has not been restored The Lions are the worst team by off/def EPA splits (not including any opp adj)
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@greerreNFL
Robby
3 months
@blueballedsport It’s not like Brady was a middling journeyman back there It’s the rings *and* the stats
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@greerreNFL
Robby
1 year
Win totals are great, but can be skewed by vig and opponent strength Using the schedule and newly released win totals for the 2023 season, we can create a more accurate view of how the market values each team Market's top 5 Teams: 1) KC 2) BUF 3) SF 4) CIN 5) PHI
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@greerreNFL
Robby
2 years
Pretty amazing
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@greerreNFL
Robby
5 months
Got asked the question "Why include YAC in a QB metric?" a lot yesterday Here's the EPA vs league average breakdown for Mahomes, Brady, Manning, and Brees Notice anything about their YAC? It's one of the feature these QBs most consistently outperformed on
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@greerreNFL
Robby
4 years
Blending together actual point differential, weighted EPA, and PFF grades together to get a sense of who played better/worse than the final score:
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@greerreNFL
Robby
3 years
There's a view that Brady was great, but lucky to win so much. Elite, but part of a system This chart does a lot for me. Throughout his career, Brady has been at his best when trailing. When bad luck or a bad gameplan got them down, Brady brought his team back better than anyone
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@greerreNFL
Robby
3 years
This was pretty fun to research and write I’m of the belief that there are no publicly known NFL trends w/ +EV If you think you have one, I’ll be happy to test it for you!
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@greerreNFL
Robby
5 years
Side project using @nflscrapR to weight EPA by different play types--Summary: By weighting EPA, it can be made more accurate in predicting out of sample point margin (i.e. wins) than past point margin or even #DVOA
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@greerreNFL
Robby
2 years
New tool on nfeloapp Seasonal metrics and advanced stats for receivers
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