Derek Brunson trained with Jon Jones ... and fought Israel Adesanya, so who'd the UFC star tell TMZ Sports would win in a fight??
Jon Bones Jones.
"I kinda know who would win the fight. Jon Jones would be a little bit too much," Brunson says.
"Jon is a high IQ fighter. So really the chance of Izzy winning that fight is really catching him and hurting him, and Izzy got the finish in this fight, but he's not really a power guy, he's more of a TKO guy.