I think Cotto is staying quiet about Mayweather to send a message to Floyd. Cotto really does not need Mayweather. Cotto is stealing the headlines now and getting lots of attention.

I think instead of calling Mayweather out, he is trying to lure him out first. Once Floyd realizes that Cotto is getting as much or more attention than him, Floyd's ego will get the better of him and he will start talking to the media first.

Cotto has a swagger about him now. He considers himself "The Main Man" of the division. He is the guy who plans on cleaning out the division.