WBC/WBA welterweight champion Floyd Mayweather Jr. (L) and WBO welterweight champion Manny Pacquiao pose during a news conference at the KA Theatre at MGM Grand Hotel & Casino on April 29, 2015 in Las Vegas, Nevada. The two will face each other in a unification bout on May 2, 2015 in Las Vegas. AFP PHOTO / JOHN GURZINSKI (Photo credit should read JOHN GURZINSKI/AFP/Getty Images)

WBC/WBA welterweight champion Floyd Mayweather Jr. (L) and WBO welterweight champion Manny Pacquiao pose during a news conference at the KA Theatre at MGM Grand Hotel & Casino on April 29, 2015 in Las Vegas, Nevada. The two will face each other in a unification bout on May 2, 2015 in Las Vegas. AFP PHOTO / JOHN GURZINSKI (Photo credit should read JOHN GURZINSKI/AFP/Getty Images)