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The 1979 Toronto Blue Jays season was the franchise's third season of Major League Baseball. It resulted in the Blue Jays finishing seventh in the American League East with a record of 53 wins and 109 losses. The Blue Jays were the only American League East team to finish 1979 with a losing record and the loss total of 109 set the franchise mark. Attendance for the season decreased to 1,431,651.