Adam Dunn hit a pair of towering homers and drove in four runs, powering the Washington Nationals past Arizona 7-2 Wednesday night before the smallest home crowd in Diamondbacks' history.
The crowd at Chase Field was announced at 15,670. Arizona started playing in the National League in 1998.
Dunn, who played 44 games for Arizona in 2008, hit a two-run shot in the first inning. He hit his 28th homer in the fourth, a solo drive. He added an RBI single in the seventh.
Adam Kennedy drove in a pair of runs with a single in the third and a seventh-inning double in support of Craig Stammen (4-4).
Ian Kennedy (6-9) struck out the first two batters of the game, then gave up a double to Ryan Zimmerman and the homer by Dunn.
Mark Reynolds returned to the Arizona lineup after being hit in the helmet by a pitch and leaving Tuesday night's game. He was examined and the Diamondbacks' medical staff determined that he was OK to play. Reynolds went 0 for 3, striking out three times.
New Diamondbacks outfielder Ryan Church, acquired from Pittsburgh in a trade July 31, doubled in the second inning in his first at-bat with his new team.
The Diamondbacks scored in the first on a leadoff walk to Chris Young, Kelly Johnson's single and a sacrifice fly by Justin Upton. But Stammen scattered five more hits over a total of 5 1-3 innings.
NOTES: The Diamondbacks optioned infielder Tony Abreu, who had been with the major league club all season, to Triple-A Reno and called up reliever Rafael Rodriguez. General manager Jerry DiPoto said the team wanted to get more at-bats for Abreu, who had 131 in 60 games. ... Arizona pitcher Juan Gutierrez, placed on the 15-day disabled list Tuesday with right shoulder inflammation, will be shut down for four or five days before throwing again, DiPoto said. ... Nationals OF Nyjer Morgan got Wednesday off because of a nagging hip injury, but was available to pinch-hit. He said before the game he felt a sharp pain in his hip when jogging.