Michael Gerard "Mike" Tyson (Born June 30th of 1966 in Brownsville Brooklyn) is a retired heavyweight boxer, media personality, pigeon lover and general odd duck.
Tyson's life is generally split in into three parts. His complete dominance of the boxing world, his fall from grace after a series of lawsuits and legal troubles, and his reemergence as a bizarre media darling with occasional acting gigs. Speaking of the latter, he is quite frequently cast as himself, and currently stars as a nuttier version of himself on Mike Tyson Mysteries.
The other wiki has a detailed description of his athletic achievements.