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🚨 Most pitchers are leaking velocity without realizing it… The problem isn’t your arm. It’s your DRIVE LEG. ⚡️ If your back leg collapses inward during the delivery, your body loses force before it ever reaches the baseball. That means: ❌ Less velo ❌ Poor command ❌ More stress... on the arm Elite pitchers do the opposite. They create powerful external rotation in the drive leg to load force, stabilize the lower half, and explode down the mound. 🔥 Here’s what separates high-velocity throwers from everyone else: ✅ Stable drive-leg mechanics ✅ Explosive force transfer through the kinetic chain ✅ Controlled momentum into front-foot strike ✅ More velocity with less arm stress Your legs generate the power. Your arm just delivers it. 💥 If you want to throw harder, move more efficiently, and train like the pros, TopVelocity breaks down the exact mechanics and drills used to build elite-level pitching velocity. 👇 Comment “VELO” and we’ll send you the training. 🔗 Or visit Brent Pourciau, Ph.D., M.S..org to start developing pro-level mechanics today. #TopVelocity #PitchingVelocity #PitchingMechanics #BaseballTraining #ThrowHardershow more

Brent Pourciau, Ph.D., M.S.

13,181 subscribers

23,043 views • 6 months ago •via X (Twitter)

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8 Comments

quintero karina1 month ago

So the secret's in my drive leg? Guess I should start working on my wobble.

Glenn6 months ago

Velo

Brent Pourciau, Ph.D., M.S.6 months ago

Appreciate it, Glenn! Velocity starts from the ground up — most people focus on the arm but the real gains are in the legs and hip load. Tons of free resources at if you ever want to go deeper on the mechanics.

Steve Pratt6 months ago

Have you ever studied what Dr. Mike Marshall of Dodgers fame lectured?

Brent Pourciau, Ph.D., M.S.6 months ago

Yes

Steve Pratt6 months ago

It’s fascinating.

Brent Pourciau, Ph.D., M.S.6 months ago

Yes Dr Marshall was definitely fascinating.

Travis Greenfield6 months ago

Really meat

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Brent Pourciau, Ph.D., M.S.

34,443 views • 4 months ago

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Brent Pourciau, Ph.D., M.S.

19,237 views • 5 months ago

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Brent Pourciau, Ph.D., M.S.

22,792 views • 4 months ago

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Brent Pourciau, Ph.D., M.S.

13,776 views • 3 months ago

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Baseball IQ

110,555 views • 1 year ago

Send this to the pitcher who’s been stuck at 78 all season. Same arm speed. 17 mph apart. The difference is what the front leg does AFTER the foot lands. The 95 guy braces the front leg and lets the body whip over it — that’s 2X, front leg extension. The 78 guy sinks into it, and the energy leaks out the bottom. What the research actually says: - Every 1° of lead knee extension from foot contact to ball release was worth +0.47 m/s of ball velocity — about 1 mph per degree. (Dowling et al., Orthop J Sports Med, 2024 · n = 100 pitchers · R²=0.22, p<.001) - In 322 professional pitchers, the 90 mph group extended the lead knee 17°. The 81 mph group: 5°. (Dowling et al., Sports Biomechanics, 2022) - The braking force in the front leg is what creates the rotational power that gets transferred into the arm. (Howenstein, Kipp & Sabick, J Biomech, 2020) - Stride-leg ground reaction force predicted up to 61% of ball velocity. Drive-leg force predicted none of it. (McNally et al., J Strength Cond Res, 2015) The cue: keep the front knee behind the heel. Brace it — don’t ride it. Want your own numbers? Upload one pitch and get your MechanicsDNA Mini — 5 peer-reviewed markers graded in about 60 seconds, in your browser. Free, no account, and the video never leaves your device. → What’s your current velo? Drop it below and I’ll tell you what to check first. #pitchingvelocity #pitchingmechanics #baseballpitching #throwharder

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Brent Pourciau, Ph.D., M.S.

65,218 views • 3 months ago

Pushing Down the Mound Is Hurting Your Velocity The biggest mistake I see is guys trying to rotate by pushing. They try to push to create linear momentum down the mound. That’s the wrong way to go about it. When you push, it actually makes it harder to rotate. And rotation is where most of your velocity comes from. Hip to shoulder separation is responsible for a huge portion of pitching velocity. If you take away from that, you’re taking away from your velo. That’s why even from your knees, you can throw close to 80 percent of your top velocity. So the goal is to maximize rotation and create as much separation as possible. The pelvis fires toward the target while the rib cage, shoulders, and chest stay back. That stretch and torque is what propels your arm through.

Pushing Down the Mound Is Hurting Your Velocity The biggest mistake I see is guys trying to rotate by pushing. They try to push to create linear momentum down the mound. That’s the wrong way to go about it. When you push, it actually makes it harder to rotate. And rotation is where most of your velocity comes from. Hip to shoulder separation is responsible for a huge portion of pitching velocity. If you take away from that, you’re taking away from your velo. That’s why even from your knees, you can throw close to 80 percent of your top velocity. So the goal is to maximize rotation and create as much separation as possible. The pelvis fires toward the target while the rib cage, shoulders, and chest stay back. That stretch and torque is what propels your arm through.

Josh Gessner

41,319 views • 7 months ago

80% of pitching velocity comes from rotation. The biggest mistake I see is guys trying to rotate by pushing hard down the mound. They try to push to create as much linear momentum as possible. That’s actually the wrong way to approach it. When you push, it becomes much harder to rotate effectively. Rotation is where most of your pitching velocity comes from. Hip to shoulder separation is responsible for about 80 percent of your velocity. If you take away from that separation, you’re taking away from your velocity. That’s why even from your knees you should be able to throw about 80 percent of your top velocity. What we want to do is maximize rotation and create as much separation as possible. Your pelvis fires toward the target while the ribcage, shoulders, and pec stay back. That stretch creates torque through your torso. That torque is what propels the arm through the throw. I created a full guide on this, so if you want it, comment guide below and I’ll send it over.

80% of pitching velocity comes from rotation. The biggest mistake I see is guys trying to rotate by pushing hard down the mound. They try to push to create as much linear momentum as possible. That’s actually the wrong way to approach it. When you push, it becomes much harder to rotate effectively. Rotation is where most of your pitching velocity comes from. Hip to shoulder separation is responsible for about 80 percent of your velocity. If you take away from that separation, you’re taking away from your velocity. That’s why even from your knees you should be able to throw about 80 percent of your top velocity. What we want to do is maximize rotation and create as much separation as possible. Your pelvis fires toward the target while the ribcage, shoulders, and pec stay back. That stretch creates torque through your torso. That torque is what propels the arm through the throw. I created a full guide on this, so if you want it, comment guide below and I’ll send it over.

Josh Gessner

18,373 views • 8 months ago

Weak side after stroke? Your body may start ignoring the affected side without you realizing it. Try simple stroke rehab drills that help the brain notice the weak arm and leg again through tapping, reaching, weight bearing, and controlled movement. Do not force it. Start safe. What is harder: stroke arm, stroke leg, balance, or walking? #OccupationalTherapy #PhysicalTherapy #StrokeRecovery #StrokeRehab #Hemiplegia #StrokeExercises

Weak side after stroke? Your body may start ignoring the affected side without you realizing it. Try simple stroke rehab drills that help the brain notice the weak arm and leg again through tapping, reaching, weight bearing, and controlled movement. Do not force it. Start safe. What is harder: stroke arm, stroke leg, balance, or walking? #OccupationalTherapy #PhysicalTherapy #StrokeRecovery #StrokeRehab #Hemiplegia #StrokeExercises

Nathan Saw

149,900 views • 1 month ago

Comment "DNA" and I'll DM you the free 2-minute MechanicsDNA Mini ⤵ The difference between 88 and 98 isn't arm strength — it's the SEQUENCE. Pelvis fires first, trunk whips after. If your pelvis is late and your trunk is dead, you're leaking 3–5 mph that your arm can't buy back. MechanicsDNA measures your pelvis speed, trunk speed, and hip-shoulder separation from ONE phone video — then prescribes the exact drills to fix your timing. Send this to a pitcher who's all arm. 🦴⚡ #pitchingmechanics #pitchingvelocity #baseballtraining #kinematicsequence #topvelocity

Comment "DNA" and I'll DM you the free 2-minute MechanicsDNA Mini ⤵ The difference between 88 and 98 isn't arm strength — it's the SEQUENCE. Pelvis fires first, trunk whips after. If your pelvis is late and your trunk is dead, you're leaking 3–5 mph that your arm can't buy back. MechanicsDNA measures your pelvis speed, trunk speed, and hip-shoulder separation from ONE phone video — then prescribes the exact drills to fix your timing. Send this to a pitcher who's all arm. 🦴⚡ #pitchingmechanics #pitchingvelocity #baseballtraining #kinematicsequence #topvelocity

Brent Pourciau, Ph.D., M.S.

10,016 views • 3 months ago

Same drill. Same body. 17 MPH difference. 🔥 The top pitcher throws 95. The bottom throws 78. Watch why 👀 ❌ Bottom: his lift leg flies open early — he rotates too soon and his front side collapses. All that power leaks out. ✅ Top: he stays closed, then braces and EXTENDS his landing leg straight through release. That's where 95 comes from. This is the difference between getting recruited… and getting overlooked. Same arm. Same body. Different mechanics. Want to know which one you are — and where you actually project (D1, the draft, or the bigs)? 👉 Get your free breakdown: Or comment "RECRUITIQ" and I'll DM you the link. Tag a pitcher who needs to see this ⬇️ #TopVelocity #PitchingMechanics #ThrowHarder #PitchingVelocity #BaseballRecruiting #3XPitching #Baseball #PitchingCoach #VelocityTraining #D1Baseball

Same drill. Same body. 17 MPH difference. 🔥 The top pitcher throws 95. The bottom throws 78. Watch why 👀 ❌ Bottom: his lift leg flies open early — he rotates too soon and his front side collapses. All that power leaks out. ✅ Top: he stays closed, then braces and EXTENDS his landing leg straight through release. That's where 95 comes from. This is the difference between getting recruited… and getting overlooked. Same arm. Same body. Different mechanics. Want to know which one you are — and where you actually project (D1, the draft, or the bigs)? 👉 Get your free breakdown: Or comment "RECRUITIQ" and I'll DM you the link. Tag a pitcher who needs to see this ⬇️ #TopVelocity #PitchingMechanics #ThrowHarder #PitchingVelocity #BaseballRecruiting #3XPitching #Baseball #PitchingCoach #VelocityTraining #D1Baseball

Brent Pourciau, Ph.D., M.S.

65,911 views • 3 months ago

Comment FLUSH and I’ll send you the drills that fix your inconsistency👇 Most golfers let the front arm pull across the chest during the backswing. It creates a chain reaction that forces you to play catch-up on the way down. Here is a simple drill to fix it: ✅ Start your

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41,862 views • 5 months ago

Breaking down the kinetic chain 🎯 Hip rotation drives velocity and efficiency on every pitch. From wind-up to follow-through, understanding internal & external rotation can improve mechanics and reduce injury risk. Which phase do you focus on most in your training?

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Driveline Baseball

27,074 views • 1 year ago

The more you study high velocity arms and draft picks you’ll start to see a lot of similarities in the delivery. This is why I love watching mechanics in slow motion so you can get a better idea of what certain positions look like in the delivery. Pitching is about creating a smooth flow of energy, being mobile enough to get into certain positions, how fast you can get out of those positions, and how well you can stabilize while getting in and out of these positions. So in this video I froze certain points in Bubba Chandlers (Pirates #1 pitching prospect) pitching motion that I think helps him throw upper 90’s. First being the hip hinge at peak leg lift focusing on balance and starting the shift of momentum down the mound, second the load into the drive leg, making it easier to control the center or mass while in the drift, third being a firm front stride keeping the upper body closed and from leaking energy, fourth being both glove side and throwing arm scap retracting while hips are beginning to open and the back foot rotating down to the ground clearing the hips into landing, next being when the front foot hits the ground upper body is still coiled and the throwing arm is inside 90 degrees, allowing the arm to properly go into lay back before elbow spiral and then internal rotation, lastly hips fully opening bringing the upper body into rotation while the lead leg braces and full extension of the torso going forward towards the catcher. #mlb #velocity #pitchingmechanics #baseball #pitchingcoach #pittsburgh #pitcher #balance #rotation #scapload #extension #energy #pitchingdrills #bubbachandler#sports#fyp#trending#viral#trendy#explore

The more you study high velocity arms and draft picks you’ll start to see a lot of similarities in the delivery. This is why I love watching mechanics in slow motion so you can get a better idea of what certain positions look like in the delivery. Pitching is about creating a smooth flow of energy, being mobile enough to get into certain positions, how fast you can get out of those positions, and how well you can stabilize while getting in and out of these positions. So in this video I froze certain points in Bubba Chandlers (Pirates #1 pitching prospect) pitching motion that I think helps him throw upper 90’s. First being the hip hinge at peak leg lift focusing on balance and starting the shift of momentum down the mound, second the load into the drive leg, making it easier to control the center or mass while in the drift, third being a firm front stride keeping the upper body closed and from leaking energy, fourth being both glove side and throwing arm scap retracting while hips are beginning to open and the back foot rotating down to the ground clearing the hips into landing, next being when the front foot hits the ground upper body is still coiled and the throwing arm is inside 90 degrees, allowing the arm to properly go into lay back before elbow spiral and then internal rotation, lastly hips fully opening bringing the upper body into rotation while the lead leg braces and full extension of the torso going forward towards the catcher. #mlb #velocity #pitchingmechanics #baseball #pitchingcoach #pittsburgh #pitcher #balance #rotation #scapload #extension #energy #pitchingdrills #bubbachandler#sports#fyp#trending#viral#trendy#explore

Toby Eigner

180,300 views • 1 year ago

How to Create Rotation With the Back Leg How you want to actually create rotation with the back leg. For me and higher level guys, I don’t even like to think about rotation. If you feel your hips rotating, it’s probably too slow. This is such a violent, explosive movement that happens in milliseconds. You shouldn’t even be able to feel it. That’s why I think about it as a weight shift. When you’re putting force into the ground, into that X direction, most of your weight is on the back leg. Then once you create that impulse and it propels you forward, all you need to think about is getting to the front leg. That force naturally rotates the hips into foot plant. For a lot of higher level guys, this helps a lot. They don’t have to think about rotating the hips. Because that can actually mess things up. Instead, it’s just force into the ground and get to the front leg. The pelvis will rotate on its own.

How to Create Rotation With the Back Leg How you want to actually create rotation with the back leg. For me and higher level guys, I don’t even like to think about rotation. If you feel your hips rotating, it’s probably too slow. This is such a violent, explosive movement that happens in milliseconds. You shouldn’t even be able to feel it. That’s why I think about it as a weight shift. When you’re putting force into the ground, into that X direction, most of your weight is on the back leg. Then once you create that impulse and it propels you forward, all you need to think about is getting to the front leg. That force naturally rotates the hips into foot plant. For a lot of higher level guys, this helps a lot. They don’t have to think about rotating the hips. Because that can actually mess things up. Instead, it’s just force into the ground and get to the front leg. The pelvis will rotate on its own.

Josh Gessner

14,028 views • 7 months ago

Stop Pushing With Your Back Leg As I trained to throw harder, I thought I needed to create a ton of momentum down the mound and really push off the rubber. That was actually holding me back from gaining pitching velocity for a couple reasons. The first reason was that pushing made it really hard for my pelvis to fire because it put me in a worse position instead of a better one. When I was pushing, it also made me fly open. The fix was thinking about keeping everything back and letting the pelvis rotate instead of pushing with my back leg. Most of your linear momentum comes from the drift and the drop in your delivery and the back leg. The back leg does have a role in building linear momentum, but its more important role is putting you in a good position to rotate. To create separation between your pelvis and your rib cage. That separation is what gives you true hip to shoulder separation that you can actually fire from.

Stop Pushing With Your Back Leg As I trained to throw harder, I thought I needed to create a ton of momentum down the mound and really push off the rubber. That was actually holding me back from gaining pitching velocity for a couple reasons. The first reason was that pushing made it really hard for my pelvis to fire because it put me in a worse position instead of a better one. When I was pushing, it also made me fly open. The fix was thinking about keeping everything back and letting the pelvis rotate instead of pushing with my back leg. Most of your linear momentum comes from the drift and the drop in your delivery and the back leg. The back leg does have a role in building linear momentum, but its more important role is putting you in a good position to rotate. To create separation between your pelvis and your rib cage. That separation is what gives you true hip to shoulder separation that you can actually fire from.

Josh Gessner

37,682 views • 9 months ago

Back leg angles 🔑 We just did a breakdown on what it takes to throw hard as an undersized pitcher. On top of maximizing mass for your frame and trunk rotational velocity, we talked a lot about ground force. Specifically, not just how to maximize the back leg impulse (how much force and how long you can hold it), but how the angle of this ground force plays a major role in whether it actually increases your momentum towards the target.

Back leg angles 🔑 We just did a breakdown on what it takes to throw hard as an undersized pitcher. On top of maximizing mass for your frame and trunk rotational velocity, we talked a lot about ground force. Specifically, not just how to maximize the back leg impulse (how much force and how long you can hold it), but how the angle of this ground force plays a major role in whether it actually increases your momentum towards the target.

Ben Brewster

12,997 views • 1 month ago