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Ben Baggett

@ben_baggett2,739 subscribers

Follower of Christ. Stanford alum. MBA. CSCS. @builtbybaggett on @instagram In-Person and Remote Spots Available. DM to Train.

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Blake Brown (Blake Brown) lives mid–upper 90s and has touched 101 mph at 6’0, 195 lbs while carrying 20–25% body fat through his midsection.⁠ ⁠ Does he throw hard in spite of that… or because of it? ⁠ ⁠ When you rotate at 95–100+ mph speeds, your trunk isn’t a rigid lever. It’s a deformable system— fascia, fat, muscle, viscera — all behaving with fluid-like properties. ⁠ ⁠ So here’s the why behind the ‘velo pouch’: ⁠ ⁠ 1. Rate-Dependent Behavior Viscoelastic tissues (muscle, fascia, fat, viscera) display time- and rate-dependent properties.⁠ -Low strain rates (walking, slow lifting): tissues deform and dissipate energy, acting as dampers that absorb shock and protect joints.⁠ -High strain rates (explosive trunk rotation): the same tissues stiffen non-linearly, behaving more like elastic springs. Instead of leaking energy, they store and recoil at the precise velocities required for throwing.⁠ ⁠ 2. Elastic Storage & Release⁠ As the trunk rotates, fascial slings that spiral around the torso are loaded. This deformation increases strain energy within the system. At pitching-level strain rates, those tissues recoil elastically, amplifying rotational velocity and contributing to the rapid acceleration of the arm.⁠ ⁠ 3. Rotational Energy Transfer⁠ Performance hinges on efficient rotational energy transfer. A more compliant torso allows greater torsional deformation (similar to wringing a towel), increasing elastic loading before recoil. Additional soft tissue mass distributes rotational forces across a larger surface area, smoothing out energy transfer through the chain and reducing localized energy leaks.

Blake Brown (Blake Brown) lives mid–upper 90s and has touched 101 mph at 6’0, 195 lbs while carrying 20–25% body fat through his midsection.⁠ ⁠ Does he throw hard in spite of that… or because of it? ⁠ ⁠ When you rotate at 95–100+ mph speeds, your trunk isn’t a rigid lever. It’s a deformable system— fascia, fat, muscle, viscera — all behaving with fluid-like properties. ⁠ ⁠ So here’s the why behind the ‘velo pouch’: ⁠ ⁠ 1. Rate-Dependent Behavior Viscoelastic tissues (muscle, fascia, fat, viscera) display time- and rate-dependent properties.⁠ -Low strain rates (walking, slow lifting): tissues deform and dissipate energy, acting as dampers that absorb shock and protect joints.⁠ -High strain rates (explosive trunk rotation): the same tissues stiffen non-linearly, behaving more like elastic springs. Instead of leaking energy, they store and recoil at the precise velocities required for throwing.⁠ ⁠ 2. Elastic Storage & Release⁠ As the trunk rotates, fascial slings that spiral around the torso are loaded. This deformation increases strain energy within the system. At pitching-level strain rates, those tissues recoil elastically, amplifying rotational velocity and contributing to the rapid acceleration of the arm.⁠ ⁠ 3. Rotational Energy Transfer⁠ Performance hinges on efficient rotational energy transfer. A more compliant torso allows greater torsional deformation (similar to wringing a towel), increasing elastic loading before recoil. Additional soft tissue mass distributes rotational forces across a larger surface area, smoothing out energy transfer through the chain and reducing localized energy leaks.

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Roki Sasaki with a sick and long awaited debut— before bumping his velo up a bit this AM, it was no secret that his fastball has been a bit down. Averaging ~98.8 in ’23 compared to ~96 last year. My social media guy has me posting insane clickbait, so I just wanted to throw these up and highlight a few differences I’m seeing: Initial CoM position at peak leg lift: -At peak leg lift, you can see back in’23, Sasaki’s center of mass is slightly shifted further away from the rubber. -Greater oppositional side-bend at peak leg lift. Back in ’23, it looks as though he’s got more pelvic side-bend to his arm side, and more thoracic side-bend into his glove side. What I think happens as a byproduct of this: -Gets stuck on his back leg—> You can see a more pronounced vertical shin now and the CoM not as far down the mound as he begins rotating. -Hingier torso posture with glove side direction slightly more across the body and higher—> Likely a byproduct of earlier pieces, trying to find some way to delay rotation. The body knows he’s trying to throw 100 and will do everything it can to delay rotating. When you see guys lose a bit of the ability to create good internal torque earlier in the delivery (get good shirt wrinkles as AnatomyLinks.com is king of demo’ing), you end up seeing the body trying to do too much downstream to make up for it. Ultimately what this all sets up is mistimed rotational and linear separation and an inefficient window for layback. Throwing hard is all about maximizing force into the baseball— which happens as the arm transitions into layback and through ball release. Do I have any idea what’s going on? No. Does Roki still throw harder than Ben Baggett ? Currently. Did this post spark interest, clicks, and possibly violence? Hopefully.

Ben Baggett

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