The 1970 season was a rebuilding year, as the Celtics had their first losing record since the 1949–50 season. However, with the acquisition of Paul Silas and future Hall of Famers Dave Cowens and Jo Jo White, the Celtics soon became dominant again. After losing in the Eastern Conference Finals in 1972, the Celtics regrouped and came out determined in 1973 and posted an excellent 68–14 regular season record. But the season ended in disappointment, as they were upset in seven games by the New York Knicks in the Conference Finals. John Havlicek injured his right shoulder in game six and was forced to play game seven shooting left handed. The Celtics returned to the playoffs the next year, defeating the Milwaukee Bucks in the NBA Finals in 1974 for their 12th NBA Championship. Boston took a 3-2 series lead and had a chance to claim the title on their home court. However, the Bucks won Game Six in Boston when Kareem Abdul-Jabbar nestled in a hook shot with 3 seconds left in the game's second overtime, and the series returned to Milwaukee. Cowens was the hero in Game 7, scoring 28 points as the Celtics brought the title back to Boston for the first time in five years.