What do two fight legends talk about on the sidelines at an NFL game? FIGHTING!!
Check out Mike Tyson and UFC Hall of Famer "Sugar" Rashad Evans chopping it up right before the Jacksonville Jaguars took on the Tennessee Titans on Thursday ... clearly trading fight tips.
You can see Evans measuring Tyson -- and doing a half roll -- while asking Tyson to evaluate his moves.
Tyson coaches him up and gives him a few tips -- while playfully throwing some kicks in the mix, something he obviously couldn't do in the boxing ring.