Pacquiao-Mayweather rematch possible? Pacman greatly interested in second bout
(REUTERS/LAS VEGAS SUN/STEVE MARCUS)Undefeated WBC/WBA welterweight champion Floyd Mayweather Jr. of the U.S. and WBO welterweight champion Manny Pacquiao of the Philippines pose during a final news conference at the MGM Grand Arena in Las Vegas, April 29, 2015.A Pacquiao-Mayweather rematch may still happen, if things go Pacquiao's way.