CNN CNN Newsroom December 16, 2013 14:27:00
And killed himself. he was 36 years old. >> someone has a concussion and it's not recognized because people aren't paying attention oit in a sport like baseball, and they get another concussion on top of it, that's not just potentially a small problem but that is a potentially lethal problem. >> reporter: increasingly, concussions are sidelining some of baseball's brightest stars. this season alone, 28 major leaguers suffered concussions, twins catcher joe mauer, philly's outfielder dominic brown and tigers catcher alex avila among them. other players including san diego's nick hunley wonder i...