Carlos Correa delivered a walk-off double against Aroldis Chapman, salvaging a superb effort by Justin Verlander and giving Houston the win over visiting New York Yankees in Game Two of the American League Championship Series.
The Astros will take a 2-0 series lead to New York for Game Three at Yankee Stadium on Monday.
With Jose Altuve on first base following a one-out single, Correa lined a 3-2 fastball from Chapman (0-1) into the right-centre field gap.
Altuve rounded the bases and scored when Yankees right fielder Aaron Judge made his relay toss toward the middle of the infield.
The subsequent throw home short-hopped catcher Gary Sanchez, allowing Altuve to score.
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Chris Taylor hit a go-ahead home run and Charlie Culberson added an RBI and a run scored as the Los Angeles Dodgers opened the National League Championship Series with a 5-2 victory over the Chicago Cubs.
Kenley Jansen came on to get the final four outs for the save as the Dodgers used five relievers in support of starter Clayton Kershaw, who lasted five innings.
