HOUSTON (AP) -- Roger Bernadina scored when Houston made two errors on the same play in the 11th inning and the Washington Nationals picked up their third straight win, 5-4 over the Astros on Monday night.
Ryan Zimmerman had two hits and two RBIs, and Michael Morse added two hits for Washington.
Wilton Lopez (3-1) pitched a perfect 10th inning but Bernadina led off the 11th with a single. On Kurt Suzuki's bunt attempt, Brett Wallace and Lopez collided before Wallace threw the ball past first base and down the right field line. Right fielder Brian Bogusevic's throw home was too high, allowing Bernadina to score and give the Nationals a 5-4 lead.
Craig Stammen (5-1) pitched a perfect 10th and got a scare in the 11th when Chris Snyder just missed a home run down the left field line before striking out. Bogusevic walked and stole second but Jose Altuve grounded out to end the game.
Tyler Clippard hit Carlos Corporan with a pitch and walked Bogusevic with one out in the ninth before Altuve doubled to tie the game at 4. Clippard struck out Marwin Gonzalez and Wallace to send the game to extra innings.
Edwin Jackson went 5 1-3 innings for the Nationals, giving up two runs and two hits with eight strikeouts. Jackson did not allow a hit after the first inning and walked two the rest of the way.
Houston's Dallas Keuchel allowed four runs -- three earned -- and a career-high 12 hits with two strikeouts in six innings. Keuchel has allowed at least four runs in each of his five losses and has given up 30 runs -- 26 earned -- over his last 25 innings.
Washington took a 4-1 lead in the fifth on a two-run single by Zimmerman followed by a run-scoring single by Morse.
Jackson led off the inning with a single, and Espinosa followed with a single. Bryce Harper walked to load the bases before Zimmerman's single. Zimmerman was thrown out trying to go to second.
After giving up three singles in the first three innings, Keuchel got into trouble in the fourth, allowing consecutive singles to Zimmerman and Morse to start the inning before Adam LaRoche tied the game at 1 with an RBI single.
Morse extended his hitting streak to 15 games.
Altuve walk to lead off the sixth and stole second before moving to third on a groundout. Altuve scored on Wallace's sacrifice fly off Tom Gorzelanny.
After Justin Maxwell tripled, pinch-hitter Steve Pearce cut the lead to 4-3 with an RBI single.
Gonzalez gave Houston a 1-0 lead in the first with second home run of the season.
NOTES: Washington claimed IF Cesar Izturis off waivers from Milwaukee on Monday. . The Nationals placed IF Mark DeRosa on the 15-day DL, retroactive to Sunday. . Washington designated LHP Atahualpa Severino for assignment. . The Nationals agreed to terms on professional contracts with four international free agents: RHP Ramses Rosario and OFs Aldrem Corredor, Darryl Florentino and Luis Guzman. . Astros C Jason Castro (right knee) continued his rehab assignment with Triple-A Oklahoma City on Monday night. . The attendance for the game was a season-low 13,843. ... RHP Jordan Lyles, who is 2-8 with a 5.95 ERA, will start Tuesday's game for Houston, while Washington will start LHP Ross Detwiler, who is 6-4 with a 3.02 ERA this season.