Getting Pitches Right Takes Timing

Scientists looked at baseball pitching. They wanted to know when the ball left the hand. That split-second matters. It helps experts study how pitchers move. The team checked three ways to guess the release. One way used the wrist. One way used a finger joint. One way used peak speed. They tried the methods on fastballs, curveballs, sliders, changeups, and splitters.

The team used motion data from 131 male pitchers. The data was grabbed at 1,000 times each second. The methods were then checked against a true release. The true release came from the gap between the ball and the third fingertip. The team measured accuracy. They used an average mistake. They measured precision. They used a typical spread. The pitch type changed the detection errors. The results were statistically meaningful. The finger joint method had the best average accuracy. It had the smallest error. The wrist method had better precision.

The biggest gap appeared for curveballs. The wrist method won. Its time was 1.1 milliseconds. The peak speed method was 1.6 milliseconds. The joint pass method was 2.8 milliseconds. Precision seemed more important. A bias could be fixed. A bias between pitchers could not. At shoulder speeds over 5,000 degrees per second, a tiny time gap caused a big error. A 2 millisecond gap led to a 10 degree error. The wrist method looked strong. It just needed pitch-specific offsets. The team thought that change could help research and clinical pitching checks.

actions