David Ortiz blasted a game-tying grand slam in the eighth inning to ease Boston's struggles at the plate as the Red Sox rallied for a 6-5 victory over Detroit on Sunday that squared the American League Championship Series at one game each.
The Red Sox were dominated by Detroit pitching in the series opener on Saturday and fared little better against starter Max Scherzer on Sunday.
Scherzer, who won 21 games during the regular season, struck out 13 Red Sox batters in a dominant outing.
The Tigers looked set to take a 2-0 series lead after scoring four runs in the sixth for a 5-0 advantage.
But after the Red Sox put up a run in the bottom of the sixth, Ortiz smashed a grand slam home run in the eighth to tie the game at 5-5.
Jonny Gomes then led off the ninth with an infield single, reached scoring position on an error, and scored on Jarrod Saltalamacchia's walk-off RBI single.
The best-of-seven series continues with Game Three in Detroit on Tuesday.