I just heard during Monday Night Football that former Heavyweight Champion Joe Frazier - one half of the greatest boxing rivalry ever with Muhammad Ali - has died of complications due to liver cancer at the age of 67. I am too young to have seen Frazier fight first hand, but as a fan of the Sweet Science who has seen a few of his fights after the fact he was one of the toughest men to ever step into the ring. I have yet to find an article about it online but when I do I'll post it here.