Damar Hamlin is pulling for the team that booted the Buffalo Bills from the playoffs on Sunday ... telling TMZ Sports he believes the Kansas City Chiefs will win their second-straight Super Bowl.
But, don't get it twisted -- #3 says he's rocking with Bills Mafia for life ... and he'll be right off that bandwagon after a brief three-hour run.
25-year-old Hamlin weighed in on this weekend's matchup with Babcock on the "TMZ Sports" TV show on FS1 this week ... and he gave us his exclusive take on who he'd like to see hoist the Lombardi Trophy.