anne-marie green. this is the "cbs morning news." geddes. i'm anne-marie green.this is the "cbs morning news." 24 hour. lots of tablets. one pill. you decide. prevacid. ♪ 24 hour >>> one of the best known boxing trainers in the world is fighting his own personal battle, and it may have been brought on by the sport he loves. bill whitaker spoke to him. >> reporter: there on the second floor of a modest strip mall in hollywood sits freddy roach's wild card gym. at five bucks day, it draws sweat-drenched boxers. there's a reason they come here. freddy roach is perhaps the best in the game, a six-time trainer of the year whose worked with champions like mike tyson, oscar de la hoya, and for more than ten years, popular welterweight champ manny pacquiquiapacquiao. a notorious brawler from a dead end boston neighborhood roach admits he overstayed his welcome inside the ropes. >> two years after i retired, i ended up getting parkinson's. >> so the sport you love may have triggered your parkinson's. >> yes, for sure. >> reporter: roach's diagnosis, trauma-induced parkins