D-backs (43-63) vs. Nationals (62-44), 6 p.m., FOX Sports Arizona
Today's starting pitchers: LHP Robbie Ray (5-10, 4.70) vs. RHP Tanner Roark (10-6, 2.96). . . . Storylines: After giving up 14 runs in back-to-back games, the D-backs will ask Ray to stop the bleeding. He had electric stuff in his last start in Milwaukee, striking out a career-high 11, before the wheels came off in the sixth. The Nationals, who have given up a total of 13 runs in their last 6 games, are now 5 games in front of the Marlins in the NL East and are tied with Texas for the second-best record in the majors. . . . Watch: 6 p.m., FOX Sports Arizona and FOX Sports GO; 6:30 p.m., in Espanol, FOX Sports Arizona Plus.
D-backs starting pitcher Robbie Ray
Ray, who got his introduction into pro baseball as a 12th-round draft pick of the Nationals in 2010, is coming off back-to-back double-digit strikeout games and is third in the majors -- behind only Jose Fernandez and Max Scherzer -- with an average of 11.19 strikeouts per 9 innings. . . . He was charged with 5 runs in 5 2/3 innings in Thursday's loss to the Brewers, but 2 of the runs scored after he had been removed from the game. He allowed 5 hits, 2 walks and struck out 11. . . . Ray is 1-5 over his past 7 starts with a 5.18 ERA but has struck out 58 batters in 40 innings.
Nationals starting pitcher Tanner Roark
Roark has given up just 1 unearned run in 5 career appearances against the Diamondbacks, covering 18 1/3 innings, but he's yet to get a decision. He's made two starts -- one each in 2013 and 2014 -- giving up a total of 1 unearned run, 8 hits and 2 walks in 14 innings. ... He was the winning pitcher in a 4-2 victory over the Giants on Thursday, limiting them to 4 hits, 3 walks and 1 run over 7 innings.
David Kohl-USA TODAY SportsDavid Kohl
Look who's overdue
The Nationals managed to pile up 19 hits and 14 runs on Monday night while getting a pedestrian 1-for-4 performance from reigning MVP Bryce Harper (he did walk twice and score 3 runs). To say he's overdue would be an understatement. Harper is 3 for 33 over his last 10 games with 1 RBI and has a total of 2 extra-base hits (1 homer, 1 double) since July 8. ... On the flip side is second baseman Daniel Murphy, who went 3 for 3 with a walk and 3 runs scored on Monday before being removed in the sixth inning. Murphy is hitting .414 (24 for 58) with a .914 slugging percentage, 9 doubles, 6 home runs and 21 RBI over his past 17 games.
Geoff Burke-USA TODAY SportsGeoff Burke
Overdue, part deux
After going 0 for 4 with a pair of strikeouts Monday, Jake Lamb's batting average is down to .279, its lowest point since June 23. Lamb, recovering from a jammed left hand that kept him out of the starting lineup for 3 games last week, is in a 3-for-36 funk with one extra-base hit (a double).
Mark J. Rebilas-USA TODAY SportsMark J. Rebilas
Wednesday's series finale
RHP Zack Godley (3-1, 5.63) vs. RHP Max Scherzer (11-6, 2.96), noon, FOX Sports Arizona.