Shane Mosley is dashing the hell out of Amir Khan's Olympic dreams -- saying it would be DUMB AS HELL to fight at the '16 Games in Rio after the way he was brutally K.O.'d back in May.
FYI, Khan has expressed serious interest in fighting for Pakistan at the summer games -- after the International Boxing Association finally voted to allow pros to compete for gold.
But after watching Khan nearly get decapitated by Canelo Alvarez last month, Mosely tells TMZ Sportsufeff, the dude needs to rethink his plan.