They are permitted to use a challenge whenever they'd like to challenge a ball or strike call; the ABS, or the robot umpires, will determine whether the pitch was indeed a ball or a strike.

pitcher or catcher can challenge a ball or strike call. That challenge must come quickly — MLB offers a little wiggle room here, but within one or two seconds as a general guideline — or the ...

History was made Thursday with the first use of the automated ball-strike challenge system during the spring training game between the Cubs and Dodgers in front of 10,959 fans at Camelback Ranch.

This spring, for the first time in Major League history, players will be able to challenge those calls — with the assistance of an automated replay review system, similar to those used in tennis and ...

The "automated ball-strike challenge system," or ABS, as Major League Baseball calls it, will not be in place for the 2025 regular season. Its use during spring training is a test to see if there ...