Your child stayed under the pitch count. The coach tracked every throw. The rules were followed. And then on the drive home, they say their arm feels sore. Or worse, something just doesn’t feel right.

In modern baseball, spin rate stands out among pitching metrics, but its true value lies in its effects on performance and injury risk. Spin rate — the speed of baseball rotation in revolutions per ...

Dr. Nick Serio is the founder and president of VeloU, a baseball performance and pitching development company focused on improving velocity, mechanics, strength and arm health through data-driven ...