Rocky Marciano's record is 49-0.
Floyd Mayweather is setting at 48-0.
Mayweather will reach 49-0. Mayweather says he is going to retire at 49-0, but I think he will go to 50-0 for the record.
I think Rocky Marciano would be disappointed if his record was never broken, he was a fighter's fighter and that's what fighters do, try to be the best.