PHOENIX -- The Washington Nationals bring one of baseball's best road records into a three-game series against Arizona beginning Monday at Chase Field, a place the Diamondbacks have had a hard time calling home.

The Nationals, 7-8 since All-Star break, are 30-24 on the road after splitting four games in San Francisco over the weekend. Only the St. Louis Cardinals (31) have more road victories in the NL.

The D-backs, home after a 3-7 trip that included stops in three time zones, are 17-35 at home. Only the Atlanta Braves (14) have fewer home wins.

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Arizona lost four- and three-runs leads in falling twice over the weekend to the Dodgers, including a 14-3 defeat Sunday. The Diamondbacks have dropped 14 of 19.

"We just didn't play a really good ballgame today," Arizona manager Chip Hale said Sunday. "Our defense really hurt us in that game."

The Diamondbacks will attempt to turn things around while facing one of baseball's best pitchers, Stephen Strasburg. The Washington ace right-hander will face Arizona right-hander Archie Bradley in the series opener.

Strasburg (14-1, 2.68 ERA) had a season-opening 13-game winning streak broken against the Dodgers on July 21 but rebounded with seven scoreless innings in a 14-1 victory over the Cleveland Indians last Wednesday. His ERA has been above 3.00 only once this season.

Strasburg is 3-2 with a 3.53 ERA in seven career starts against Arizona. He is 2-2 at Chase Field and has lost starts in each of the previous two seasons there. He was charged with eight runs (seven earned) in 3 1/3 innings of a 14-6 loss defeat on May 12, 2015.

Bradley (4-6, 4.17 ERA) has been the D-backs' most consistent starter recently, although the results have not always shown it. He is 2-3 with a 3.06 ERA in his past eight starts, posting five quality starts in that span. Bradley, whose presence has been critical after the loss of Zack Greinke to a left oblique strain on June 28, has never faced the Nationals.

The D-backs will see if Yasmany Tomas's strong road trip translates in the six-game homestand that also includes a three-game series against the Milwaukee Brewers.

Tomas hit .375 with five doubles, four homers and 10 RBIs on the 10-game trip that concluded at Dodger Stadium on Sunday. He had two-homer games in Cincinnati and Milwaukee on the trip and has 14 of his 17 homers on the road this season. He is batting .309 in 45 road games and .223 in 45 home games.

Washington's Daniel Murphy, one of the most productive players in the league since signing as a free agent in the offseason, missed two weekend starts but was used as a pinch hitter Sunday. He leads the NL in batting average (.350), on-base-plus-slugging percentage (1.009), hits (131) and doubles (31).

"We're a different lineup without Murphy," Nationals manager Dusty Baker said.

D-backs second baseman Jean Segura has hit safely in 11 of his past 13 games and is batting .353 with four doubles and two homers in that span. He is second in the NL with 129 hits.

The Nationals added closer Mark Melancon in a trade with Pittsburgh to firm up their bullpen Saturday morning. Melancon, who had 30 saves and a 1.51 ERA with the Pirates, reported to the Nats on Sunday in San Francisco but did not get in the game as Washington fell 3-1 to the Giants.

Melancon, who attended the University of Arizona, had a major-league-best 51 saves last season.

The D-backs also renovated their bullpen over the weekend, purchasing the contracts of left-handers Adam Loewen and Steve Hathaway from Triple-A Reno while optioning lefty Zac Curtis to Double-A Mobile and designating right-hander Josh Collmenter for assignment. Setup man Tyler Clippard was traded to the New York Yankees for minor league right-hander Vicente Campos on Sunday, about three weeks after closer Brad Ziegler was sent to the Boston Red Sox.

Arizona setup man Daniel Hudson also is available heading to the Monday afternoon trade deadline.

"The bullpen is definitely something right now that is up for grabs," Hale said.

Diamondbacks third base coach Matt Williams will face his former team for the first time this season. Williams served as the Nationals' manager for the last two seasons before being replaced by Dusty Baker last fall.