@VercingetorixTheGreat: I doubt very highly that Mayweather would be seriously hurt by one punch from Bruce, much less knocked out.
The fact is that there is no record Bruce ever fought someone of Mayweather's skills, or abilities.
I suggest that you let this go, anyone saying that Bruce would actually defeat Floyd in boxing, is either doing it on purpose or simply doesnt know what they are talking about.
Sadly, the case in this matter is the latter one. The Vine merry go round, can be quite frustrating. Bruce Lee fanatics, cannot distinguish real life, from fantasy. lol