Elijah Burke was officially 98-1 (not 103-1 like WWF says) as an amateur boxer.
I know it probably wasnt against top notch talent, and Im not saying hed win, but he'd probably make Mayweather at least look bad before getting knocked out. Thats why it would never happen, because even if Mayweather knocked him out, if he's made look bad by a wrestler in a "real" boxing match then it would be worse for him than if he actually lost.
He can't be made to look much worse by what he's doing now, so your whole point is.... pointless.