There were 1,145 calls challenged during the 2015 Major League Baseball's 2,430-game regular season.

The Rays had the most challenges (54) and the lowest success rate (31%). The Tigers had the least amount of challenges (27) and the 3rd-lowest success rate (40%).

Of the Top 10 teams with the most challenges, 7 were in the Bottom 10 of the worst success rates: Rays (31%), Red Sox (40%), Rangers (34%), Astros (46%), Blue Jays (44%), Braves (50%), and Padres (44%).