Retired NFL player Robert Griffith says he never blacked out or had to leave a game due to concussion, but he made 1,300 tackles in his career in games alone and "a lot of hitting goes on ... "
See more video clips with retired NFL player Robert Griffith.
Produced by Noel Gunther and Erica Queen, BrainLine.
About the author: Robert Griffith
Robert Otis "Griff" Griffith is a former American football strong safety in the National Football League. He also served as an executive member of the National Football League Player's Association for six years.