Manny Pacquiao's shoulder gave out against Floyd Mayweather Jr. On SI Now, Olympic boxer Joseph Diaz Jr. reveals Manny Pacquiao's shoulder injury deterred his strategy against Floyd Mayweather Jr.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceOn SI Now, Olympic boxer Joseph Diaz Jr. reveals Manny Pacquiao's shoulder injury deterred his strategy against Floyd Mayweather Jr.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished May 4, 2015 | Modified May 4, 2015SI STAFFShare on FacebookShare on XHome/Boxing