Mayweather vs. Pacquiao -- "75% Chance Rematch Happens" ... Says Bob Arum

They’re not officially in negotiations, but Manny Pacquiao’s promoter tells TMZ Sports there’s a 75% chance of a rematch with Floyd Mayweather. We spoke with Bob Arum — who says the two camps are on great terms. In fact, when Floyd sat ringside at…

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