LAS VEGAS -- Floyd Mayweather works in the solitude of his own gym, which by his standards does not mean privacy. The fight with Miguel Cotto is six weeks away. But HBO's "24/7" programming begins in three weeks, and for boxing's last rock star, the show and fight remain indistinguishable, professionally and personally.

We know Mayweather is boxing's last big rock star, because no less an authority than Rolling Stone magazine is about to declare him as such, in what is planned as an…

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