Some professional athletes, however, have developed an unhealthy passion for video games. For example, Gilbert Arenas of the Washington Wizards, an avid video gamer, became so obsessed about winning at Halo that he played games with a fake teammate to drive up his experience points. And Joel Zumaya, a pitcher for the Detroit Tigers, was unable to pitch in 2006 after suffering forearm and wrist inflammation in his arm from playing too much Guitar Hero.
via nytimes.com