Watch: Astros top Dodgers in extras on Jason Castro's walk-off homer

Astros catcher Jason Castro sealed a win with an extra-inning walk-off shot.

Houston entered Sunday's game against the Dodgers thinking sweep, and catcher Jason Castro provided it with an extra-inning walk-off shot.

With one out, nobody on and a 2–0 count in his favor in the bottom of the 10th, Castro took Dodgers reliever Chris Hatcher deep to left for an opposite-field walk-off homer and a 3–2 victory.

The play was briefly reviewed to make sure the ball cleared the fence after it bounced off a fan (who was unable to haul it in) and back onto the field.

The streaking Astros completed the three-game sweep, greeting Castro at the plate and dousing him with Powerade shortly afterward.

Amazingly, Castro's home run sealed Houston's fourth walk-off win in its last eight games, which have also included a no-hitter thrown by Mike Fiers on Friday. Houston went 7–3 in a 10-game homestand against Detroit, Tampa Bay and Los Angeles.

• MORE MLB:Highlights | Analyzing Fiers's no-hitter | Astros in playoffs?

The Astros lead the AL West at 69–56, four games ahead of the Texas Rangers with 38 games left.

- Jeremy Woo