you know what rocky's secret was? he may have been 5-7 165, but he competeed as a heavyweight champ. how? because he was more DURABLE than anyone. he had the uncanny ability to absorb blows and keep on fighting. his opponents found out the hard way...no matter how much bigger and stronger they were, no matter how many times they punched him, he would NOT go down.
Drago had 2000 psi punches, and in fact landed at least 80 DIRECT HITS to rocky's head, but he would NOT GO DOWN. drago even said during the fight, 'he is like a peice of iron'. poor guy didnt know what to do, and eventually even he lost the fight simply because rocky could absorb a mack truck and he would still be in the fight.
that said, im not sure how anyone could beat him, even if he is 60 years old.