Justin Thomas and Kevin Kisner won national championships in college - Thomas at Alabama and Kisner at Georgia.
Now they're backing their teams in Monday night's CFP championship game. That's football while Thomas and Kisner were championship golfers.
Kisner played on Georgia's 2005 NCAA Division I men's golf title team, and Thomas played on Alabama's 2013 NCAA Division I men's golf title team.
Thomas issued a challenge to Kisner via Twitter on Sunday: The golfer with the losing alma mater in the football championship game will wear the winning team's jersey with his name on the back.