I was going to start a thread about PacMan's odd demeanor before, during, and after the fight. I'll place it here because maybe, though I'm frankly still not sure how, Pac's injury explains it.

He was unusually happy and content before the match, as many journalists observed. But this continued during the fight, with a lot of smiling and offers to touch gloves. He did not fight mean, fight with any desperation, and made no attempt at a Hail Mary. Afterwards, he was, well, happy and content with his performance. He did not behave like a man who thought he was robbed.

He behaved like a man who was going thru the motions. I thought at the time that he simply knew he was done, or at least that he could never beat Mayweather. He had already accepted this, already moved on, and was thus happy and content.

An alternative hypothesis is that he knew this fight "wouldn't count". He was injured and promised a rematch in return for not pulling out. So he just went thru the motions.