WASHINGTON -- Having already won their first series at Nationals Park since April 2016, the Philadelphia Phillies will go for the sweep of Washington on Sunday night.
Phillies right-hander Nick Pivetta (4-6, 4.08 ERA) faces Nationals right-hander Jefry Rodriguez (0-0, 4.66).
Pivetta was drafted by the Nationals in 2013 and went to the Phillies in 2015 as part of the Jonathan Papelbon trade.
After struggling for three straight starts -- giving up 13 runs in 14 innings -- Pivetta allowed two runs and four hits in 7 1/3 innings of a no-decision against the St. Louis Cardinals last time out, striking out a career-high 13 batters.
"That's some of the best stuff I've seen him have all year," catcher Andrew Knapp told mlb.com. "The curveball was electric."
Pivetta got 11 swings and misses with the curveball.
"It was nice to have it back," Pivetta told mlb.com. "It all started with my delivery. I was staying up through it, not trying to rush too much and it worked out."
It his first start -- and second big-league appearance -- the 24-year-old Rodriguez picked up a win against the Baltimore Orioles on Tuesday. He allowed five runs, four hits and three walks in five innings.
Rodriguez and Satuday's losing pitcher, Erick Fedde, are filling in for injured starters Stephen Strasburg and Jeremy Hellickson.
The Phillies have outscored the Nationals 17-5 in the fist two games of the series. On Saturday, Maikel Franco had four hits and Carlos Santana homered to back Aaron Nola in a 5-3 victory.
"That was just a tremendous all-around baseball game," Phillies manager Gabe Kapler said of Franco. "It's so interesting how we've been looking for him to be not just a hitter but a defender and a baserunner and an all-around athlete."
Franco drove in a run and scored twice, including the go-ahead run when he scored just ahead of the tag on Jesmuel Valentin's sacrifice fly.
The Phillies, who have won six of seven, pounded out double-digit hits for the second day in a row in Washington.
"They have a lot of patient hitters," Fedde said of the Phillies. "I think that's what makes it tough. Guys aren't swinging at bunch of junk, so you have to attack them."
The Phillies have now won four straight series for the first time since May 2016 and are 2-0 in what will be a stretch of 10 games against the Nationals and the New York Yankees.
Anthony Rendon homered and Daniel Murphy had a two-run single for Washington, which has lost three of four while scoring nine runs.
"Look, I've got all the confidence in the world we're going to start hitting," Nationals manager Dave Martinez said. "We'll start scoring some runs. Right now, the bullpen is a little beat up. We've got to get them going again."
Rendon is doing his part. In his las 15 games, he is batting .382 with seven doubles, two homers and 12 RBIs.
Hellickson (right groin strain) will make a rehab start Sunday for Class A Potomac and then is expected to rejoin the Nationals' rotation.
Hernandez said first baseman Ryan Zimmerman (right oblique strain) is about a week from beginning a rehab assignment.