Pitch data is most useful when it answers a coaching question. Collecting numbers without a purpose can create noise instead of a better plan.
Velocity
Velocity is ball speed. Compare readings under similar conditions and consider pitch type, intent, fatigue, and whether the athlete is in a development or competition setting.
Spin Rate
Spin rate reports how quickly the ball rotates. It does not independently tell you whether a pitch is effective; spin direction, efficiency, velocity, movement, location, and pitch pairing all matter.
Horizontal and Vertical Break
Horizontal break describes side-to-side movement relative to a reference trajectory. Induced vertical break describes vertical movement attributable to aerodynamic forces rather than gravity alone. Different pitch types are expected to occupy different movement profiles.
Turning Data Into a Decision
A coach might use TrackMan to establish a baseline, compare grips, monitor a pitch-design change, or understand how two pitches work together. The best conclusion is often a simple action the pitcher can repeat, not a long list of metrics.