The 1986 American League Championship Series was a back-and-forth battle between the Boston Red Sox and the California Angels for the right to advance to the 1986 World Series to face the winner of the 1986 National League Championship Series. The Red Sox came in with a 95–66 record and the AL East division title, while the Angels went 92–70 during the regular season to win the AL West.

Boston won the series, 4–3.

Tuesday, October 7, 1986, at Fenway Park in Boston, Massachusetts

Angels left fielder Brian Downing went 2-for-5 with four RBI and Mike Witt pitched a five-hit complete game, as California cruised to an 8–1 win.

Wednesday, October 8, 1986, at Fenway Park in Boston, Massachusetts

The next day, the tables were turned. Bill Buckner scored the winning run in the fifth inning on a Dwight Evans double, and the Red Sox tacked on insurance runs in the seventh and eighth. Boston claimed a 9–2 victory and tied the series at one game apiece.

Friday, October 10, 1986, at Anaheim Stadium in Anaheim, California

In the seventh inning, Dick Schofield homered for California to give the team a 2–1 lead. Gary Pettis followed shortly thereafter with a two-run home run of his own. The Halos won by a score of 5–3 and took a 2–1 series lead.

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