I found this story rather amusing. It seems that the pitcher from the Detroit Tigers had an injury related to Guitar Hero that he actually had to seek treatment for.
Tigers' athletic training staff discovered that Zumaya's forearm pain was more consistent with the action of a guitar player than a baseball pitcher. The Tigers asked Zumaya to stop playing the video game, and he did. Zumaya then pitched pain-free during the World Series, and went 0-1 with a 3.00 ERA in three appearances.