Dave DeBusschere, who had been acquired from the Detroit Pistons the previous year, combined with Frazier and Reed to anchor the league's best defense.
Coach Red Holzman led the club to wins in 60 of its 82 regular season games to pace the league.
In just their second season in the league, the Milwaukee Bucks totaled 56 wins helped by rookie superstar Lew Alcindor.
Coach Gene Shue led a squad looking to improve after their early playoff exit the previous year.
Under coach Richie Guerin, they fielded a solid starting five, led again by scorer Lou Hudson.