It was in the 1970s that the O'Jays gathered a following and rose to the top of the charts. "In 1978, we released one of our biggest singles ever: 'Used Ta Be My Girl.'" the group posted last year ...

According to his son, Duane, Isles worked as The O'Jays' tour manager from 1971 to ... Isles spent the latter part of the 1970s in Los Angeles before moving his family to Oceanside in 1981.