He also helped train Duane Bobick .
Frazier made a cameo appearance in the movie Rocky later in 1976 and dedicated himself to training local boxers in Philadelphia , where he grew up , including some of his own children .
Frazier also helped train Duane Bobick .
Frazier made a cameo appearance in the movie Rocky later in 1976 and dedicated himself to training local boxers in Philadelphia , where he grew up , including some of his own children .