Mayweather's the only one between them I've heard on numerous occasions wish their opponent well after they fought. Mayweather ""My prayers go out to the Pacquiao family," Mayweather tweeted. "I know he loves the sport of boxing, so hopefully he can bounce back." Read more at http://global.christianpost.com/new...-pacquiao-after-ko-86389/#PAdEPTjcAxtoM1tj.99
What's your point? That Mayweather says nice things about people? If so, then you're wrong to say he's the only one. Check out Ward's comments on Pavlik when Pavlik retired.
Ward on Pavlik retiring and pulling out of the fight: "I'm happy for him. It's a tough business. It's a tough way to make money. It's a tough way to provide for your family. And fighters, they get in there and over time and over years they take punishment. So for him to be able to get out on his own terms, I'm happy for him [....] You know people say he's only 30, why would he retire, but he gets tired, man. And if the right opportunity is not there where he can't get motivated, then sit it on down. Spend time with your family. So I'm happy for him" Bradley on his rival Khan's loss to Garcia: "I wanted him to win the fight. It's something that he can bounce back from, that loss [.....] But the fact that Khan wants to fight anybody and everybody, I think that he still has his respect from the boxing fans. That fact that he's willing to go and to face anybody in their home town [....] Amir Khan still has some marketability left, but his stock has definitely dropped a lot. He's got a lot of rebuilding to do, and, honestly, it's going to take some time [....] In the past, we have not been the most cordial with each other, you know what I mean? But there's nothing that I have bad to say about the dude, man [....] He's coming off of one of the worst losses of his career, and he has to rebound from this, you know? So I wish him the best, and I wish him good luck in the remainder of his career."
To be fair, it didn't take much time to prove your thread wrong. All it took was a quick Google search and a copy-and-paste job to show your assertion of Mayweather being the only person to wish another fighter well lol: some of you Mayweather fans make me laugh), is nonsense.