I love this story from Thesz's bio:
"In 1963, Thesz came out of semi-retirement to win his sixth World Heavyweight Championship from Buddy Rogers, at the age of 46. Legend has it that Rogers was having second thoughts about dropping the title, and Thesz responded by saying, "we could do this the easy way or the hard way" . He would hold the title until 1966 when, at the age of 49, he was dethroned by Gene Kiniski."