Boxing - Beaten Pacquiao reveals right shoulder injury

US boxer Floyd Mayweather Jr., (L) watches Manny Pacquiao of the Philippines during their welterweight unification boxing bout at the MGM Grand Garden Arena in Las Vegas, Nevada on May 2, 2015. AFP PHOTO / JOHN GURZINKSI (AFP Photo/JOHN GURZINSKI)

- Filipino ring icon Manny Pacquiao revealed he was battling a right shoulder injury on Saturday in his unanimous decision defeat to Floyd Mayweather.