A Tyson comeback is fun till you realize he's 11 years older than comeback era George Foreman here, and 1 year older than when Foreman totally retired from boxing......
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And those shorter offensive heavyweights: Dempsey,Marciano,Frazier never seemed to have long careers . They needed speed and explosive power,to get in close to bigger opponents and hammer them on the inside,
They were done by their early 30's,when physical decline set in.