The ABS challenge system leaderboard ranks batters, pitchers, catchers, teams and umpires throughout the MLB season.

Which teams are challenging the most? When in games are challenges being used? Is the new system leading to more walks?

SCOTTSDALE, Ariz. — Major League Baseball is changing … again. Amid an era that has already seen significant alterations to the sport, most of which have been received favorably by fans and players ...

Baltimore Orioles third baseman Coby Mayo accidentally challenged a pitch he didn't want to during an 8-5 loss to the Arizona ...