PHILADELPHIA -- Center fielder Odubel Herrera drove home the winning run in the bottom of the 10th inning with a double as the Philadelphia Phillies beat the Washington Nationals 3-2 on Saturday night.

Catcher Carlos Ruiz led off the 10th by singling off Tanner Roark (0-1), the fifth Washington pitcher. Right fielder Grady Sizemore flied out to deep left, with Ruiz advancing to second on the play. Herrera then slapped an 0-2 fastball from Roark down the first base line to drive in Ruiz.

It was also the first major league RBI for Herrera, who was claimed from the Texas organization in the Rule 5 draft last December. He is just the second rookie to make the Phillies’ Opening Day roster since 1970.

The Phillies, who rallied from a 2-0 deficit, came from behind for the second straight day against the Nats. They scored four seventh-inning runs in a 4-1 victory on Friday.

Dustin McGowan (1-0) pitched a scoreless inning to earn the victory for Philadelphia.

Wilson Ramos homered in the fourth for Washington, and an RBI single in the eighth by pinch-hitter Clint Robinson gave the Nationals a 2-0 lead.

The Phillies knotted it off reliever Blake Treinen in the bottom of the eighth, however, as first baseman Ryan Howard drove in a run with a double to left and Ruiz followed with an RBI single, a ball that squirted between shortstop Ian Desmond and second baseman Danny Espinosa as they converged near the bag.

Phillies left fielder Ben Revere threw out the go-ahead run at the plate in the 10th, when Washington center fielder Michael Taylor attempted to score on a single by third baseman Yunel Escobar.

Nats starter Doug Fister, making his first start of the season, went 6 1/3 shutout innings and yielded six hits, while striking out one and walking one. Known for his sharp sinker, he recorded 11 ground-ball outs.

Philadelphia starter Cole Hamels worked seven innings and surrendered two hits and one run, on Ramos' homer, while striking out five and walking two.

Ramos, a right-handed hitter, took an 0-1 fastball from Hamels to the opposite field for a one-out solo homer in the fourth. It was Ramos' first of the season.

Hamels had skated out of a two-on, one-out jam in the first.

Fister found himself in trouble in the bottom of that inning, but second baseman Danny Espinosa cut second baseman Chase Utley down at the plate, after right fielder Bryce Harper dug Howard's double out of the corner.

The Phillies also put their first two men on in the third and fifth, but were unable to score.

NOTES: The attendance for Friday night's game, a 4-1 Phillies victory over the Nationals, was the lowest in the history of Citizens Bank Park, and the lowest for a Philadelphia home game since 18,002 attended a game against Montreal in Veterans Stadium on Sept. 3, 2003. The last time the Phillies drew fewer than 20,000 fans at home was on April 26, 2006, when they played Colorado. ... Philadelphia manager Ryne Sandberg said before the game he had yet to get a full report on RHP Chad Billingsley, who pitched 3 1/3 innings Friday night in a rehab start at Triple-A Lehigh Valley. "He came out of it fine," Sandberg said. Billingsley has been on the disabled list since March 27 following right flexor tendon surgery. ... Nats OF Jayson Werth, on the disabled list since March 27 after offseason shoulder surgery, went 1-for-4 with a homer in a double-header Saturday for Class A Potomac, as his rehab assignment continues.