Chris Borland was probably a better rookie linebacker than most in the history of the National Football League. It isn’t an overstatement – he was headed in Luke Kuechly territory. Then he retired.
This all happened due to concussions. Not the ones Chris Borland was diagnosed with, but the ones he felt he suffered over his long football career. According to a recent ESPN The Magazine feature by Steve Fainaru and Michael Fainaru-Wada, Borland said he received at least 30 concussions while playing football.
And yes, his football career was long.