Charles Barkley challenges Jimmy to a golf game, calls out his rival Shaquille O’Neal for being a bully and gets surprised by a question from Shaq about his underwear-wearing habits.

Fallon revealed O’Neal asked him a video question: “A source close to me tells me you don’t wear underwear when you’re live on TV. How come you don’t wear drawers?”

Barkley revealed 10 years ago, he thought they were unnecessary and he burned all his underwear.

You know the NBA season is right around the corner when Shaq and Charles are talking about free balling on the Tonight Show. 

TMI