Manny Pacquiao is a legendary fighter and an obvious future Hall of Famer with a résumé a mile long filled with one big win after another. He's the only boxer in history to win world titles in eight weight classes and he'll go down as one of the best ever.
But he has also been punching for pay for 23 years and has been involved in numerous grinding, physical battles. They take their toll. He is also no longer a full-time boxer. He holds down a full-time job as a senator in his native Philippines but will return to the ring for the first time in a little over a year -- since a hugely controversial decision loss to Jeff Horn that cost his welterweight title -- when he challenges Lucas Matthysse for his secondary welterweight belt at Axiata Arena in Kuala Lumpur, Malaysia.