This guide explains how different pitch types behave through the lens of Trackman data, with a focus on horizontal movement and how it helps identify and evaluate pitches.

What Trackman Measures

Trackman uses radar to capture key pitch metrics such as:

• Velocity
• Spin rate
• Spin axis
• Horizontal and vertical movement

For pitch classification, movement patterns—especially horizontal break—are critical.

Pitch Types & Movement Profiles

Slider

• Typically shows strong horizontal break
• Moves away from the hitter (glove-side movement)

Trackman often identifies sliders by:

• Lower velocity than fastballs
• Sharp lateral movement

Used to deceive hitters with late break

Two-Seam Fastball (Sinker)

• Produces arm-side horizontal movement
• Often has slight downward (sinking) action

Trackman characteristics:

• Moderate to high velocity
• Movement toward the pitcher’s arm side

Effective for weak contact and ground balls

Cutter

• Moves slightly opposite to a two-seam fastball
• Shows subtle glove-side movement

Trackman identifies cutters by:

• Velocity close to a fastball
• Less break than a slider

Used to jam hitters or induce weak contact

Summary

Each pitch type has a unique movement signature, and Trackman uses these patterns—especially horizontal movement—to classify pitches and provide accurate, data-driven insights. Understanding these differences helps improve analysis, troubleshooting, and overall pitch evaluation.