Is Floyd "Money" Mayweather The Best Professional Boxer Ever?

Floyd "Money" Mayweather has gone on record to call himself the best fighter ever. He has caps, and T-shirts that says "TBE" (The Best Ever) He's gone on record to rank himself #1 all time ahead of Muhhamad Ali, and a few others based on his undefeted streak of 49-0. This past Saturday, Mayeather defeated Andre Berto to tie Rocky Marciano in consecutive wins without a loss. Should we call Mayweather "The Best Ever"?  If not him who should call the best ever? Or should we be calling anyone that? Tune in as well as call into the show to give your opinions on this subject.