The Astros evened the ALCS at two games apiece after a win in Game Four.
Houston scored seven times with two outs in the ninth inning to escape Fenway Park with a 9-2 win over the red Sox.
Jose Altuve hit a game-tying home run in the eighth inning and Michael Brantley broke the game open with a bases clearing double in the ninth.
Nathan Eovaldi was charged with the loss after allowing four runs in two-thirds of an inning.
Kendall Graveman earned the victory with a pair of scoreless innings of relief.
Xander Bogaerts hit a two-run homer for Boston.
Game Five is today at Fenway.
(Photo by Omar Rawlings/Getty Images)