The following season, the Bucks traded for Cincinnati Royals guard Oscar Robertson to complement Alcindor. Subsequently, the Bucks finished 66–16, the second-most wins in NBA history at the time, and still a franchise record. During the regular season, the Bucks recorded a then-NBA record 20-game win streak. Posting a 12–2 record in the playoffs, they won their first NBA championship on April 30, 1971, by sweeping the Baltimore Bullets in four games. By winning it all in only their third season, the Bucks became the fastest true expansion team in the history of North American sports to win a championship.