AT THE BUZZER!!!
Damar Hamlin's proving he's a baller on the field and the court ... sinking shots during a charity basketball game -- including the game-winner.
The Buffalo Bills safety hosted the contest through his Chasing M's foundation Saturday night in Pittsburgh ... and, it seemed only fitting the NFLer put the finishing touches on the game.
Check out the clip ... Damar draws his defender in tight before executing an impressive fake that leaves his foe on her backside.