Dean Jackson @doublexcanflex Twitter profile

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Dean Jackson

@doublexcanflex

5 years

If you like slow motion footage of pitchers who throw hard then you're going to enjoy this YouTube playlist

Slow Motion Videos of High Level Pitching Mechanics

www.youtube.com

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Dean Jackson

@doublexcanflex

4 years

Filmed this awesome video of @BauerOutage the other day. Such a great example of extremely efficient throwing

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Dean Jackson

@doublexcanflex

2 years

+8 mph over 18 months (87-95 mph) What changed from an energy flow perspective? (1/5)

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Dean Jackson

@doublexcanflex

11 months

One of the most common issues I see in guys who don’t throw as hard as they’d like to

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Dean Jackson

@doublexcanflex

9 months

Everything up, everything down

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Dean Jackson

@doublexcanflex

4 years

enjoy this slider from @HackAttackimer during some live ABs today

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Dean Jackson

@doublexcanflex

2 years

+6 mph over 6 weeks (88-94 mph) What changed from an energy flow perspective? (1/7)

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Dean Jackson

@doublexcanflex

8 months

You don’t drift down the mound, you send the energy into the back side to load it

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Dean Jackson

@doublexcanflex

4 years

if you liked @HackAttackimer 's slider in the last video, wait till you see his changeup in this one👀

Dean Jackson

@doublexcanflex

4 years

enjoy this slider from @HackAttackimer during some live ABs today

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Dean Jackson

@doublexcanflex

3 years

If mechanics were the only thing that mattered in throwing velo you’d see a heck of a lot of 14 year olds throwing 95+

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Dean Jackson

@doublexcanflex

10 months

I think the back side is a pull, not a push

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Dean Jackson

@doublexcanflex

3 years

Don’t be surprised when you get absolutely run over in competition when you treat your training like a buddy-buddy social club

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Dean Jackson

@doublexcanflex

5 years

Every time I post one of these Edgertronic videos it reminds @drivelinebases that he lent me one and I sit in fear for a few hours that he's going to ask for it back. You're freaking welcome for my anxiety Path of the energy in throwing, 94 mph heater by @dup_thereitis

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Dean Jackson

@doublexcanflex

3 years

In my experience, telling pitchers to “use their legs” with no other context does much more harm than good. “Legs” and “use” just aren’t specific enough. What part of the legs? What do you mean by use? When? What does that look like exactly? What does that feel like?

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Dean Jackson

@doublexcanflex

4 years

. @BauerOutage inspired an entire generation of pitchers to look at their careers from a growth mindset and played (+ continues to play) a HUGE part in fundamentally changing baseball as a whole. Congrats on the Cy Young Award, time to get to work on the next!

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Dean Jackson

@doublexcanflex

3 years

“Just throw strikes” is incomplete and selfish advice. The only reason you want pitchers to just throw strikes is because hitters get themselves out at the lower levels (where you’re probably watching or coaching). Not going to help them get hitters out at higher levels. 1/2

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Dean Jackson

@doublexcanflex

1 year

Know where the gas pedal is

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Dean Jackson

@doublexcanflex

10 months

95 ✅, progression post TJ continues @KingofJUCO

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Dean Jackson

@doublexcanflex

5 years

There are 2 different pieces to pelvis rotation in the throw: 1. back leg/hip initiates rotation with the goal of getting the pelvis to the right spot at the right time to be driven by the impulse from the block 2. impulse from the block finishes rotation and transfers energy up

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Dean Jackson

@doublexcanflex

9 months

Drive ALL the way through, not just a short burst that only takes you 1/3 of the way

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Dean Jackson

@doublexcanflex

9 months

The throw is triggered from the back side

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Dean Jackson

@doublexcanflex

4 years

Wanted to highlight the long term velo development success one of my online pitching trainees has had, we'll call him Cumulonimbus. He's gone from a lifetime best of 85 mph (sitting 83), to hitting 94 multiple times with a bunch of 93s. I'm pumped to watch him break 95 here soon!

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Dean Jackson

@doublexcanflex

10 months

Your back foot is extremely important in how you drive

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Dean Jackson

@doublexcanflex

3 years

Don’t post stupid comments on my YouTube

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Dean Jackson

@doublexcanflex

11 months

Common small detail that typically drops velo

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Dean Jackson

@doublexcanflex

4 years

94.0-94.9 in today's pen. not fully healthy but steadily getting closer. what a journey so far, extremely grateful to be given the opportunity to keep chasing it

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Dean Jackson

@doublexcanflex

3 years

Tendon and ligament prep sessions starting to get much more specific to throwing

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Dean Jackson

@doublexcanflex

3 years

I don't think it's possible to know how hard someone throws by looking at their mechanics shout out @kylelindley_ for the behind the scenes work on looking for similar movements in mocap takes One of these pitchers is 90-94 t96, the other 96-100 t102. Which is which?

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Dean Jackson

@doublexcanflex

11 months

You can’t efficiently make up for poor movement earlier in the sequence by trying to compensate later on. Each piece will unload based on how they are loaded

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Dean Jackson

@doublexcanflex

5 years

A problem I see with a lot of amateur players that want to be pro players; time spent in the gym and on the field is treated more like a social club than training. You're there to get better, work on deficiencies, learn, test your limits, etc.

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Dean Jackson

@doublexcanflex

3 years

I've had 4 elbow surgeries, 5 elbow hydro-dissections, 1 elbow stem cell injection, and 1 hip surgery. I've personally performed 15+ return to throw programs, done a whole lot of different PT approaches, and seen lots of different qualified pros I don't think rehab heals you

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Dean Jackson

@doublexcanflex

2 years

Just added 10 slowmo pitching mechanics vids of guys from the @PerfectGameUSA event at Chase Field in AZ last night to the YouTube playlist Like this 100mph heater from Travis Syroka (Twitter kills the quality, check them on YouTube for full resolution)

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Dean Jackson

@doublexcanflex

3 years

Rehab coming along 👀. Throw in 2.5 weeks

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Dean Jackson

@doublexcanflex

4 years

Plyometric bench machine is built, getting some volume in to onramp for some testing + higher intensity plyo training

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Dean Jackson

@doublexcanflex

2 years

IMO there’s a massive difference between training with the goal of just getting better vs training with the goal of getting as good as you possibly can I think just getting better than you are now is pretty easy, but getting as good as you possibly could be is incredibly hard

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Dean Jackson

@doublexcanflex

1 year

Today is my last day at @DrivelineBB . Over the last 7+ years I’ve met, trained alongside, coached, and worked with some amazing people that have helped change my life forever! So many great memories and experiences that have continued to shape me. Looking forward to the future!

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Dean Jackson

@doublexcanflex

2 years

Hip and Shoulder Separation (more accurately Pelvis and Ribcage Separation) isn't just rotational, it happens in all 3 planes of motion: Y - side to side Z - rotationally X - front to back

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Dean Jackson

@doublexcanflex

8 months

Drive to separate, not to just push you down the mound

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Dean Jackson

@doublexcanflex

1 year

Had to have my man @KingofJUCO catch the first 90 in the return to throw after TJ. Slow progression continues!

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Dean Jackson

@doublexcanflex

10 months

Tightening up is killing your velo

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Dean Jackson

@doublexcanflex

10 months

You trigger the throw before the front foot hits

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Dean Jackson

@doublexcanflex

3 years

Don’t assume that because most pitchers aren’t noticeably jacked that lifting doesn’t help throwing velo very much. It’s easy to see the amount of muscle someone has, but you can’t see the muscle fiber type, tendon, and neurological adaptations.

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Dean Jackson

@doublexcanflex

5 years

Linear momentum blocked up the chain, this sequencing is great. Big fan of this

Rob Friedman

@PitchingNinja

5 years

John Gant, Mechanics (97mph Fastball).

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Dean Jackson

@doublexcanflex

2 years

One of these throws is 96.6 mph the other is 92.4 mph Which is which?

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Dean Jackson

@doublexcanflex

5 years

Thread on lead leg blocking: Linear momentum down the mound is important in a pitcher's throwing velocity, but only if they can block it and transfer it to the upper half. This clip of Jan Zelezny blocking the linear momentum and sending it up the chain is a great example

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Dean Jackson

@doublexcanflex

1 year

Connecting the dots for some guys during pens

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Dean Jackson

@doublexcanflex

11 months

“Do you want to build an adaptation or not?” Strengthening the scapular stabilizers and shoulder rotation

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Dean Jackson

@doublexcanflex

4 years

Cleaning out the shed at my moms house, found this old squat rack I built in college had zero money, found everything I needed to build it for free or cheap on Craigslist, OfferUp, and YouTube If you REALLY want to get something done, you will. If you dont, you probably wont

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Dean Jackson

@doublexcanflex

3 years

Came across some training videos from years ago, this one from mid 2015. Back then baseball training wasn't popular at all, if you trained like we think about it today you were definitely freaking weird. No one would throw with me, convinced my gf to hold the gun. What a time

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Dean Jackson

@doublexcanflex

2 years

I think it’s extremely important for the coach to train the athlete to be their own best coach, instead of training them to rely on the coach for everything I’m not gonna be there in season with you, you HAVE to know what you’re doing and why you’re doing it

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Dean Jackson

@doublexcanflex

10 months

Inside the mindset

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Dean Jackson

@doublexcanflex

4 years

Yesterday was my first time throwing to a catcher in 1408 days. Still got a way to go on the elbow rehab, but excited for how far it’s come Huge thank you to @ayerzy56 for coming out to catch

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Dean Jackson

@doublexcanflex

3 years

Throw 1 of the rehab. Throwing partner @KingofJUCO loving it Lots of work to do, lots of work already done!

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Dean Jackson

@doublexcanflex

10 months

One of the most common and expensive energy wasting misunderstandings of how hip / shoulder separation works IMO

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Dean Jackson

@doublexcanflex

4 years

What's going on in this video and why do I consistently program this for highly trained pitchers? In this thread I ask some questions and answer them. Let's dive in!

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Dean Jackson

@doublexcanflex

3 years

I honestly think this is significantly more effective at building scapular stability through full ROM than light band work or other light lifting. I don’t really understand at all why throwers “shouldn’t” lift overhead. Why wouldn’t you train full, healthy ROM?

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Dean Jackson

@doublexcanflex

3 years

Peak mound velos for @KingofJUCO throughout Project 95 or Die. Literally lost sleep last night thinking about how we're gonna approach giving him a shot to grab 100 LOL. The work continues!

KingofJUCO

@KingofJUCO

3 years

95MPH FINALLY LFGGGGGGG Took me exactly 151 days to get here. Man what a feeling. LFG @DrivelineBB

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Dean Jackson

@doublexcanflex

3 years

After my UCL repair in 2018 I was REALLY anxious about how difficult it was for me to throw just 70 mph. How am I going to go play pro ball again if I’m putting everything I have into it and it’s only 70? It’s literally all I could think about at that stage of the rehab

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Dean Jackson

@doublexcanflex

8 months

“and that’s when I realized I’ll never make it.” 😂 . Full podcast with @KingofJUCO on my YouTube

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Dean Jackson

@doublexcanflex

4 years

I view the shoulder as a slingshot or trampoline in throwing. The rotation of the torso loads the internal rotators of the shoulder (pec and lat), and that loading unloads into the ball

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Dean Jackson

@doublexcanflex

2 years

Long periods of rest and reducing stress as much as possible all the time will likely end up in injury Pitchers’ UCLs adapt to throwing by getting thicker and more lax, and to long periods of no throwing by getting thinner and less lax ( @PeterChalmersMD )

The ulnar collateral ligament responds to stress in professional pitchers - PubMed

The UCL responds to stress in professional pitchers by becoming thicker and more lax, and responds to rest by becoming thinner and less lax.

pubmed.ncbi.nlm.nih.gov

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Dean Jackson

@doublexcanflex

3 years

"No, I need the pressure. Without the pressure there's no me" is a STRONG quote. A few really good insights into the mind of one of the best competitors to ever do anything here

Jaycob Ammerman

@Jammer2233

3 years

Mike Tyson on Failure

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Dean Jackson

@doublexcanflex

2 years

Heavier weighted balls are generally less peak torque on the throwing shoulder and elbow than lighter balls But why is that? (1/6)

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Dean Jackson

@doublexcanflex

3 years

A @DrivelineBB all-hands presentation by @kylelindley_ on R and D projects this summer has me pumped about the force plates in the mocap lab installation again Not knowing EXACTLY how rotating and pushing work during the drive phase haunts my nightmares. Excited to learn more

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Dean Jackson

@doublexcanflex

2 years

+10 mph over 2 years (85-95 mph) What changed from an energy flow perspective? (1/6)

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Dean Jackson

@doublexcanflex

4 years

Rehab bullpens continue to get better, still a ways to go

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Dean Jackson

@doublexcanflex

3 years

King of Pelvis Rotation

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Dean Jackson

@doublexcanflex

10 months

What actually happened during @KingofJUCO ‘s 95 or Die

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Dean Jackson

@doublexcanflex

3 years

Weighted balls change how much stress is applied to the arm and the length of time it is applied. Learn about the factors that go into calculating arm stress and how changing the weight of the ball you're throwing affects it at the YouTube link below:

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Dean Jackson

@doublexcanflex

9 months

Know where the gas pedal is

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Dean Jackson

@doublexcanflex

2 years

Stress Recover Adapt That’s the process to build. Too much stress is bad (you might break). Too little stress is bad (you atrophy). Apply the right amount and right kind of stress on the right days, recover, and repeat repeat repeat

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Dean Jackson

@doublexcanflex

9 months

back foot, extremely important

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Dean Jackson

@doublexcanflex

5 years

Now that Luke Hagerty ( @X2Athletics ) is a big deal everyone knows who he is. Over a decade out of professional baseball, kept training, and finally back in it. However I bet they don't know he still uses a Hotmail email address he made in the late 90s. That's real commitment

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Dean Jackson

@doublexcanflex

10 months

This warm up mistake is costing you mph and performance

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Dean Jackson

@doublexcanflex

3 years

Drilling drive mechanics today, searching for the feel and real I want to use on the mound

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Dean Jackson

@doublexcanflex

10 months

The plan to increase velo past this 95 mph throw

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Dean Jackson

@doublexcanflex

10 months

Now we’re talking

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Dean Jackson

@doublexcanflex

6 years

A super common question I get on the floor at Driveline is: What else can I do to get better? It's a pretty great question, so let's unpack it a bit:

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Dean Jackson

@doublexcanflex

4 years

One of the Olympic weightlifting books I read recently started out with this: "I could tell you everything I know about weightlifting in 10 minutes, but it would take you 10 years to understand what I said" I think about this quote a lot

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Dean Jackson

@doublexcanflex

9 months

Holding the front foot closed isn’t necessary, but pulling the front side open with the front foot is also gonna cause issues

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Dean Jackson

@doublexcanflex

3 years

When they get to any sort of competitive baseball, just throwing strikes is how you get smacked around the ballpark. Throwing high quality pitches where you want them with a plan based on how your stuff moves is much better advice. 2/2

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Dean Jackson

@doublexcanflex

2 years

A lot of people get caught up in the “hard work beats talent when talent doesn’t work hard” mantra. Which like sure, if your genetics are close enough to the talented guy not working hard. Normal people working incredibly hard will not get close to elite genetics being lazy

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Dean Jackson

@doublexcanflex

4 years

The drive + the impulse of the block, my favorite point in the delivery. So much happening here that needs to be timed just right.

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Dean Jackson

@doublexcanflex

2 years

I think if you don’t know how the energy is transferred from piece to piece in a throw, you’ll have a really hard time making any sort of meaningful and lasting mechanical improvements. Because of that, step 1 when I train a pitcher is always education on how the throw works

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Dean Jackson

@doublexcanflex

3 years

I think bench press is a lift that should be a staple of every pitcher's program. Should be modified if the pitcher has issues with the lift (and very seldom removed completely). More detailed thoughts on the subject in the video below:

Why Pitchers Should Bench Press

A pitcher's shoulder experiences A LOT of torque during a throw. Building your 1rm bench press is a great addition to a training program to help prepare the ...

www.youtube.com

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Dean Jackson

@doublexcanflex

7 years

This way of thinking severely damaged my mental health and took years for me to get over. Coaching is not 1 way, its a 2 way communication.

Trent Mongero

@CoachMongero

7 years

When a coach is coaching you up or disciplining you, the only words appropriate & necessary are "yes sir." Everything else starts an excuse.

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Dean Jackson

@doublexcanflex

3 years

Training to get better at baseball is now completely normal, I don’t think you could say the same 5-10 years ago. The next thing to become the norm will be pushing yourself in an intense environment on very specific things tailored to your own needs

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Dean Jackson

@doublexcanflex

5 years

The first time I applied at Driveline I didn’t even get to the interviews. Second time (a year and a WHOLE LOT of experience later) they brought me on as an intern. Since then have moved into a manager role. Learn, do, create, try, fail, repeat. Get better literally every day.

Yabin

@TheJoeMarsh

5 years

Wanna work at Driveline? Do these things

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Dean Jackson

@doublexcanflex

8 months

Over and over and over

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Dean Jackson

@doublexcanflex

7 months

Pick a spot on your back foot to stay on the entire time through the drive, vs transitioning to different parts of your foot

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Dean Jackson

@doublexcanflex

8 months

Take the drive all the way through

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Dean Jackson

@doublexcanflex

2 years

Advice I just gave to an athlete I’m training that I wanted to share: Don’t get lost in the minutia of mechanics that don’t matter a huge amount Dominate the stuff that REALLY matters, let everything else be what it is

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Dean Jackson

@doublexcanflex

2 years

If each piece in your kinetic chain could do the job to throw 100 mph, BUT one piece could only handle the stress equivalent of 90 mph, your body has two options: 1. Throw 90 mph “safely” 2. Throw harder than 90 and break that weakest link Can’t get that out of my head

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Dean Jackson

@doublexcanflex

8 years

An extremely accurate, in no way overstated or exaggerated, depiction of what happens to pitchers who don't train biceps

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Dean Jackson

@doublexcanflex

9 months

Loose allows the energy coming up the chain to load you, then contract from there

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