CNN CNN Newsroom December 15, 2013 21:03:00
It's not recognized, because people aren't paying attention to it in a sport like baseball and then thet get another concussion on top of it. that's not potentially a small problem but potentially a lethal problem. >> reporter: increasingly, concussions are sidelining some of baseball's brightest stars. this season alone 28 major leaguers suffered concussion. twins catcher, phillie's outfielder and tigers catcher among them. other players including san diego's player wonder if they'll be healthy in retirement. >> you're responsible to your family first, and if you continually play through conc...