By TMZ Sports

Eight division world champion Manny Pacquiao says his right shoulder surgery was a rousing success -- and just posted his first post-op selfie to prove it. Pacman went under the knife in L.A. Wednesday night to repair a torn rotator cuff  in his right shoulder -- an injury that he didn't properly disclose to officials before the big Floyd Mayweather Jr. fight last Saturday night at the MGM Grand in Las Vegas.