It’s safe to say teams and players are getting the hang of the ABS Challenge System.
Major League Baseball on Monday revealed that 54 per cent of the 175 challenges over the opening weekend of the 2026 season resulted in overturned calls.
The ABS Challenge System Powered by @TMobile was used for the first time in regular season MLB games during Opening Week. Here is a refresher of the rules and statistics collected over the past 5 days:
— MLB (@MLB) March 30, 2026
Total challenges: 54% overturn rate (175 attempts)
Catchers: 64% overturn… pic.twitter.com/2n6DtT2Sc5
Catchers had the highest rate of overturns at 64 per cent of their 92 attempts. Batters called for ABS on 78 occasions and were successful only 42 per cent of the time. The lowest level success - and lowest usage - came from pitchers who were successful on 40 per cent of their challenges. Of course, pitchers only called for a challenge five times.
After rolling out ABS in the minor leagues over the past few years, the system took hold in the big leagues as of this season. Teams start each game with two challenges and they are retained if successful. Should the call be confirmed, the team loses that challenge and cannot challenge again when their two are exhausted. Each team will be given an additional challenge should the game go to extra innings.
Only catchers, pitchers and batters can call for a challenge.



