1978 Boston Red Sox
On July 19, the Red Sox led the Yankees by 14 games. New York went 52-21 down the stretch to tie Boston for first place in the AL East. The Yankees won a one-game divisional playoff thanks to Bucky Dent, right, and Reggie Jackson. A three-run homer by Dent gave the Yankees a 3-2 lead in the 7th and a solo shot by Jackson in the 8th helped the team hold on to win 5-4.