Floyd Mayweather Disses Manny Pacquiao at Autograph Signing, 'Victim 48!'

Floyd Mayweather is mocking Manny Pacquiao -- and he wants the world to see it -- more proof he's trying to bait the fighter into a rematch in 2020. The undefeated 42-year-old was signing autographs at the Art of Music shop inside the MGM Grand in…