Stuff Goal Projector
Pitch physics, both directions — metrics → movement and movement → metrics.
Inputs
°
gyro
?
: 8%
°
SSW is approximate — seam orientation isn't measured, so this is a coach-set offset layered on the physics.
Target movement
Enter the break you want; the tool solves the spin axis & efficiency needed (at the velocity/spin above). Or just drag the ball.
Spin axis & airflow — drag the ball to tilt
travel direction
airflow (curves toward Magnus force)
Movement
—
Induced vertical
ride
ride
—
Horizontal
arm side
arm side
| Spin efficiency used | — |
| Total spin / transverse | — |
| Approx. pitch type | — |
| Movement source | — |
SSW breakdown approx
| Magnus alone | — |
| SSW contribution | — |
| SSW share of break | — |
Break plot (horizontal vs. induced vertical, with pitch-type clusters)
Movement is computed by numerically integrating the release-to-plate trajectory (Magnus from transverse spin, drag, gravity), with induced vertical break measured gravity-subtracted against a no-spin reference. SSW is an approximate add-on. Benchmarks: 2025 MLB Statcast. This is a physics estimator for development planning, not a measurement.