Bruce Lee was an absolute beast and personal hero, in fact I am wearing a Bruce Lee Shirt right now. But, GSP had a lot more than 20 pounds on him. GSP probably walks at like 185-190 and Lee weighed 135 to 150 at his heaviest.
I realize this. But I dont know that Buce wouldve given a shit lol. He trained with guys twice his size and manhandled them
EDIT: also this thread is the inspiration for me finally making a sig lol