Despite allowing eight hits and four walks, Wade Miley blanked the Nationals for 6 2/3 innings on Thursday.
Jordan Pacheco went hitless and committed a game-ending error Thursday as the Diamondbacks lost to the Nationals.
Diamondbacks outrighted RHP Bradin Hagens to Triple-A Reno.
Ender Inciarte tied the game with a two-run home run in the eighth inning, but the D'Backs lost 3-2 in walk-off fashion against the Nationals on Wednesday.
Trevor Cahill pitched well, but got a no-decision after allowing two runs in 6 1/3 innings in Wednesday's walk-off loss to the Nationals.
Chase Anderson was lit up by the Nationals on Tuesday, surrendering six runs in two-plus innings.
Diamondbacks chief baseball officer Tony La Russa has denied a report that the club has decided to bring back manager Kirk Gibson next season.
Bob Nightengale of USA Today reports that the Diamondbacks are planning to bring manager Kirk Gibson back for 2015.
Diamondbacks right-handed pitching prospect Aaron Blair strikes out seven over six shutout innings, scattering four hits and one walk for Double-A Mobile on Monday.
Didi Gregorius ended an 0-for-21 slump on Monday, going 2-for-5 with a two-run home run in Monday's 11-inning 5-4 loss to the Nationals.
Vidal Nuno got a no-decision after allowing two runs in seven innings in Monday's 11-inning loss to the Nationals.
Diamondbacks recalled RHP Will Harris from Triple-A Reno.
Diamondbacks optioned RHP Bradin Hagens to Triple-A Reno.
Diamondbacks released OF Aaron Cunningham.
Diamondbacks prospect Stryker Trahan went 3-for-4 with a double and a home run for short season-A Hillsboro on Saturday.