If Pac ko's Mayweather, it might kill me. I just cannot see that happening. Last time Pac got in a real fight and smelled blood, Marquez blasted him. Pac does not want that to happen again, so he isn't going to do anything rash. Like get himself in a fight. He didn't KO Algieri, and he was brought in specifically to get knocked out.
Mayweather doesn't want to get into a fight, either, never has, and is skillful enough to avoid it. I expect that, at best, this could be a good crisp boxing match, at worst very dull.