Think about it. TD Sandman only had one new move, the Wink Punch. While being the only move in the entire game not telegraphed by the boxer flashing red, it is also the only move telegraphed by the boxer himself. While the titular wink could just fit in with his theme of sleeping, it looks to me more like, "I'm about to hit you, so move out of the way." Maybe he didn't want to bother being champion anymore, what with the cheating galore from your opponents.
Pretty interesting, if you ask me.