antonius
In the US maybe, but internationally Mayweather is likely known only by other fighters.
Jerry S
not by a long shot.......................
Blue nose
No he is not, he's not half as good!
Addax
If you are comparing sport to sport, Yes he is, McGregor is the first name that comes to mind when you hear MMA, he is also the richest MMA fighter by a lot. Whether you like him or not, whether you think he is a good fighter or not, it doesn't matter, he is the top dog in that sport and he can't be replaced, Floyd was replaced the second he left, he was replaced before he even left, MMA cannot replace McGregor he is their biggest money racker, so it that sense yeah he is a bigger icon.
Pearl
i would hope not