Driveline Baseball Pitching Trainer @drivelineBB
Kent, WA
Joined March 2025
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Rollin Payton Tyler retweeted
10/6/26 Bullpen
FB: 90-91
Sinker: 89-90
Change: 82-83
Sweep: 75-76
@Yaks_Baseball @PTPitching @CoachKrueg @Coach_Panch @jfripp14 @CoachSalsa @PNW_Uncommitted
Rollin Payton Tyler retweeted
9/30/26 bullpen
FB: 89-91
Sinker: 88-89
Change: 80-81
Sweep: 75-76
@Yaks_Baseball @PTPitching @CoachKrueg @Coach_Panch @jfripp14 @CoachSalsa @PNW_Uncommitted
Rollin Payton Tyler retweeted
The Marlins are running one of the most interesting side quests in baseball right now
Their best starters are also their highest-leverage relievers?
Let's talk about it 🧵
Velo, two new shapes, flatter usage, a workload plan, and command built on top of it.
That's the path to the all-star version of Hogan Harris.
Link to part 1.
xitter.cf/PTPitching/status/2100…
Execution prep.
High intent bullpens with the new mix, live ABs as needed.
Simulated ABs with intended zones give instant feedback: how each pitch grades and where to locate for run value, whiff, and chase by batter hand and pitch type.
Practice has to look like the game.
Workload.
Relievers can fade late in outings and on short rest.
That work runs all offseason as we dial in his Pulse data, ramp progressions, and which implements and volume/intensity mixes move the needle. He leaves knowing how his body responds better than ever.
Command comes last. We throw to targets all offseason, but once velo and shapes stabilize, command becomes priority #1.
High intent, target-focused throwing with oversized and undersized balls, plus IZT miss distance training to measure exactly how far he misses.
The cutter.
Target: 92-93+ mph, 11-14 in IVB, 0 to +3 in HB. Ideal average looks something like: 92.5, 13 IVB, +1.5 HB.
It isn't a new pitch. He threw it in 2025. The work is getting it back, adding a little HB, and keeping it separated from the sweeper.
The sweeper.
Target: 79-85+ mph, 11-15 in HB, -1 to +5 in IVB. More velo and more sweep only help vs lefties.
In that range it grades 55 to 70+ vs LHH. It's the shape his arsenal is missing and a third look lefties have to cover.
Velo.
The mechanical room shows up in motion capture: proprietary comp scores and movement analysis built on years of lab data.
Constraints narrow toward faster solutions, with designed high intent days. Mocap, pitch metrics, and velo are the feedback. He finds the solution.
Early on, we open up his options as widely as possible.
As the offseason goes on, we narrow the work toward what makes his pitches better, and let him find his own most effective way there within those tighter boundaries.
Every rep still has a goal: a target, a velo, an arm speed. He finds new ways to get it done instead of repeating one pattern.
We're not coaching positions. We're building adaptability. We set up the problem, adjust it as needed, and he sorts out the solution.
Javelins, footballs, handballs, plyos, softballs, undersize baseballs etc.
Each changes mass, moment arm, and moment of inertia. Add kneeling, single leg, spin and jumping throws, or catching and bouncing it first, and every rep is new.
Onboarding.
Throwing ramps back up with every throw tracked on Pulse. RPE, velo, and workload targets keep it controlled.
This is also where the fun is: movement discovery.
Phase 1: assess and deload.
Pitching assessment, arm care screening with FlexPro grip and ArmCare, and a full high performance assessment of strength, power, and mobility.
Before we ask him to throw harder, we find out what's limiting him.
The order matters: velo, shapes, command, then execution in a game-transferable environment.
Command sits on top of velo and shape. Change those and his feel has to recalibrate, so we build the pitches first and sharpen them once they stabilize.
Hogan Harris pt. 2
Last week: the return he'd get on a tick of velo, a platoon problem, and a workload gap.
This week: how we'd build his offseason, including the sweeper and cutter shapes we'd work towards, + more.
massive implications on future of pitcher usage. Baseball is in such a cool state right now in this regard
in the past we had relievers in fireman roles, but then we got the closer, then we saw openers, some moderate length relievers...
This could be a gas next step
Most pitches thrown by a starter in a game where they are less than 3 days from their next outing
Sandy Alcantara (101 pitches)
Eury Perez (97 pitches)
Aaron Ashby (44 pitches)
What the Marlins are doing right now is groundbreaking, they are taking a starters normal mid-week bullpen and simply doing it in a game environment. I have so many questions about this....
- How different is the intent between the bullpen and the actual game? Can a starter effectively control their intent so as not to throw at 110% on just 3 days rest?
- Can this hold up over a large season sample?
- How does this affect them and the bullpen in terms of value (WAR, WPA)? How much value can a starter add by doing this for an additional ~30-50 innings in mid to high leverage outings?
