NEW YORK (AP) — Major League Baseball will experiment with a technology system to challenge checked swing calls in the Class A Florida State League starting Tuesday.
Using a Hawk-Eye system, a checked swing call can be challenged by either the team at bat or on defense.
The decision will be made based on whether the bat head is ahead of the knob by more than 45 degrees — matching the first-base line for a right-handed hitter and the third-base line for a left-handed hitter. Short of 45 degrees will be called a no swing.
A team will be allowed to make a challenge until it has one unsuccessful challenge.