Attles joined the then-Philadelphia Warriors in 1960. On March 2, 1962, he was the team's second-leading scorer with 17 points on the night Wilt Chamberlain scored 100 points. There is a probably apocryphal story to the effect that one of the sportswriters covering the game began his filing with the lede "HERSHEY, Pa. -- Wilt Chamberlain and Al Attles combined for 117 points last night as the Philadelphia Warriors defeated the New York Knicks 169-147." Attles moved with the team to the Bay Area at the end of the 1962 season, playing until 1971. Attles was known as "The Destroyer" due to his defensive specialities along with once punching a player in the jaw. He was a role player on the 1964 Warriors team (with Wilt Chamberlain and Guy Rodgers) that made the NBA Finals and eventually lost the championship series to the Boston Celtics, four games to one. Attles also played on the Warriors' 1967 team that lost to Chamberlain's 68-13 Philadelphia 76ers in an evenly matched, six-game championship series.