Modern pitch design became popular because ball-tracking tools made invisible details visible: velocity, induced vertical break, horizontal break, spin axis, spin efficiency, release height, extension, and pitch-to-pitch separation. But the data only helps when it answers a baseball question. A pitcher does not need a prettier movement chart. He needs a pitch that solves a specific problem.
A good workflow starts by asking three questions: what can this pitcher throw, what should this pitcher throw, and can he throw it often enough with intent and command? Driveline's public pitch-design work has repeatedly emphasized that arm slot, release traits, and shape feasibility matter. Premier Pitching's pitch-design phase framework makes the same practical point: the pitch has to fit the athlete, the training calendar, and the evaluation threshold.
Step 1: Profile the current arsenal
Start with the pitches the athlete already owns. The fastball tells you a lot: release slot, ride or sink, spin efficiency, natural cut or run, and whether the pitcher tends to work behind the ball or around it. The breaking ball tells you whether he can supinate without losing too much velocity. The changeup or splitter tells you whether he can kill speed, create arm-side action, or use seam effects without slowing the delivery.
- Map fastball shape, release height, extension, and command zones.
- Identify whether current breaking balls are distinct or redundant.
- Check whether the offspeed pitch actually separates from the fastball.
- Review usage by count and handedness instead of only looking at average shape.
- Compare the pitcher's goals against his workload phase and recovery status.
Step 2: Define the problem before choosing the pitch
"Add a sweeper" is not a complete plan. The problem might be same-side whiffs, opposite-side weak contact, a fastball bridge, a strike pitch, or a way to keep hitters off a riding four-seamer. Those problems require different shapes. A low-slot right-hander trying to miss right-handed barrels might test a sweeper. A high-slot pitcher who already has a depthy curveball might need a cutter or sinker more than a bigger horizontal breaking ball.
This is where pitch design differs from pitch collection. More pitch types do not automatically create a better arsenal. A new pitch is useful when it changes the hitter's decision window, improves matchup coverage, creates a count-specific weapon, or gives the pitcher a safer way to get contact when a high-whiff pitch is not the right call.
Step 3: Choose a testable shape
A pitch-design target should be specific enough to evaluate. Instead of saying "better slider," set a target such as: a harder cutter that stays near fastball intent, a sweeper that gains glove-side movement without becoming a slow curveball, or a sinker that moves arm-side enough to justify using it against opposite-handed hitters. The target does not need to be perfect on day one. It needs to be measurable.
For example, adding another fastball shape can make sense when the primary fastball is too predictable. Driveline's discussion of multiple fastball shapes argues that pitchers can benefit from more than one heater when the shapes serve different jobs. MLB and FanGraphs coverage of Ben Brown's two-seam fastball is a public example of a pitcher adding a shape to change how hitters experience his arsenal.
Step 4: Test grips without changing the delivery first
Early testing should change the ball before changing the athlete. Grip, seam orientation, finger pressure, thumb position, and intent cue are lower-cost variables than trying to rebuild the delivery. If a pitcher has to radically change arm slot to create a pitch, the new pitch might be stealing from the fastball or damaging command.
- Run short grip blocks, not endless high-intent guessing.
- Track the best and worst miss, not only the best single rep.
- Watch whether the pitch changes mechanics, tempo, or release height.
- Keep the fastball in the session so the pitcher does not drift away from his base delivery.
- Stop testing if fatigue makes the data meaningless.
Step 5: Validate in baseball context
A pitch can look good in a bullpen and still fail in a game. The next test is whether the pitcher can land it, chase it, pair it with the fastball, and throw it from the same delivery under game-like intent. Pitch tunneling work matters here because hitters respond to release, early trajectory, speed, and movement together, not to a spreadsheet column in isolation.
This is also where pitch design connects back to programming. New-pitch work is still throwing workload. If a pitcher is in a velocity phase, a return-to-throw phase, or a heavy competition block, the amount of pitch-design experimentation should change. Developmental fit is not just about movement. It is about timing.
A simple pitch design checklist
- What hitter problem does this pitch solve?
- Does the target shape fit the pitcher's arm slot and hand action?
- Does it separate from the existing arsenal?
- Can the pitcher throw it hard enough to matter?
- Can he land it and expand it?
- Does it preserve the fastball and the rest of the arsenal?
- Is the athlete in the right workload phase to train it?
Pitch design is strongest when it is treated as a controlled experiment. The goal is not to copy a major leaguer's grip. The goal is to find the best baseball solution for this pitcher, at this arm slot, with this arsenal, in this training phase.
If you want a place to connect pitch design, throwing plans, mechanics review, and progress tracking, download Pitch AI on iPhone or join the Android waitlist. Pitch AI helps turn pitch design ideas into organized training decisions.