19. A.J Burnett (2010)
Burnett committed a special kind of stupid error in a game against the Rays. After he allowed four runs on four hits, he lost his cool. As the Yankees star walked back to the clubhouse between innings, he slammed his palms against the door. Somehow, he cut both of his palms in the process. This ridiculous action put him out of the game. Later, he apologized to his teammates.

“To me controlling your emotions and not hurting yourself and hurting the team’s chances to win is more important,” Manager Joe Girardi said (via ESPN). “Because if you hurt yourself you have no chance to help us.” This should be obvious but even highly-trained athletes lose their cool. However, Burnett was lucky because the Yankees still defeated Tampa Bay.