The 1978 Boston Red Sox season was the 78th season in the franchise's Major League Baseball history. After 162 regular-season games, the Red Sox and the New York Yankees finished tied atop the American League East division, with identical 99–63 records. The teams then played a tie-breaker game, which was won by New York, 5–4. Thus, the Red Sox finished their season with a record of 99 wins and 64 losses, one game behind the Yankees, who went on to win the 1978 World Series.