Bruce Lee by TKO after Crawford ends up not wanting to engage thanks to Bruce covering himself and anything near him in saliva after trying to maintain his staple diet of heathy "Whaaaaaa!!!", "Oooooooo", and "wooaaaaaa..." noises while wearing a mouth guard.
If LEE can beat Han at 160 when Han who had an illegal glove that had claws then I'm pretty sure he will beat bud.