There's "reports" coming from inside Mayweather's camp that he's throwing a lot more punches than usual in his sparring and he's even KO/TKO'ing the partners. This may only be rumor. I know Mayweather is all about mind games, and he's already doing a lot, so it wouldn't be surprising if he's trying to get Pac's team to lose more confidence and rattle them. But if it's true, then good. Looks like we may see a fight come May 2nd.
Yes. But sparring hard doesn't equal Knock outs. Maybe he's busting people up, but I doubt he's KO'ing sparring partners. Floyd is just playing mind games. He would be really dumb to change his style in the biggest fight of his life.
...but I have actually heard consistent talk of him at the very least making people quit (and pee blood) in sparring, if not scoring knockouts per se. Then again, there are similar gym legends surrounding Pacquiao too. Or at least, used to be, with some more frequency.