Floyd Mayweather saying he doesn't want to fight Khan because he's not known outside boxing?

What kind of excuse is that?! I think many will know who Khan is as he was Olympic Silver medalist in 2004 and went onto win numerous word titles and the name gets around.
I take it that Mayweather is worried about him then and Mayweather imo often resorts to mind games and excuses to try anf frustrate/annoy opponents and prospective opponents. If I was Khan, I'd carry on pursuing Mayweather but if Mayweather ducks him, then I'd like to see Khan fight either Pacquio, or get it on with Brook and I would like to see remtaches with Danny Garcia and Lamont Peterson. I think I'd prefer to see the rematches sooner than later but it might be better for Khan's confidence to try and beat Brook or Pacquio first.
I agree with Syntax Error that the likes of of Garcia and Peterson trouble Khan more as they keep on coming and pressurise him, but that is why Khan will have to FOCUS/concetrate bigtime, stick to his game plan and out box them as well as hopefully knocking them down too. The fights might have to happen at catch weight though, will Khan be able to come down in weight and be effective? I hope so.
I have to say that while Khan seems to be getting bigger and bigger and thats why he has to move up in weight, his punching power does seem to have diminished a lot since he moved up from lightweight. In the Olympics and while he was at Lightweight as a pro, his punches in general seemed to hurt all opponents and now its only seems occasionally that his punches either hurt or do damage and for that reason, Mayweather should not duck Khan.
Khan's right hand did seem to bother Alexander when he did get through with it, especially when it was a right hook, even the left hooks seem to hurt Alexander and a couple of times I noticed Alexander didn't like it when Khan landed on his body/ribbs area and maybe Khan should work on body punches more but without getting caught?
In general, if Khan's punching power has gone down since he moved up from lightweight then he will have to try and out box opponents more and as we have seen in a lot of his fights, he can win by out boxing people.