how many challenges in mlb

In Major League Baseball (MLB), each team is allowed to make 1 manager challenge per game during the regular season. If the team wins the challenge (the call is overturned), they retain the ability to challenge again, potentially making up to 2 challenges in total per game. In the All-Star game, playoffs, and any tie-breaker situation, each team can make 2 challenges per game to start with. Additionally, a new automated ball-strike (ABS) challenge system has been recently introduced and tested, allowing pitchers, catchers, and batters to challenge ball and strike calls, with each team starting with two challenges in this system during games where it is used. The ABS challenge system is currently experimental and has been used in spring training and minor leagues, with possible regular season implementation upcoming.