PHOENIX -- A visit to the mediocre NL West has revved up the Cincinnati Reds.
Adam Dunn hit a grand slam and the Reds rallied for the second night in a row, beating the Arizona Diamondbacks 6-2 Saturday for their first road series win of the season.
Sean Casey drove in two runs with a single and double, his first RBI in 13 games, and Ray Olmedo matched his career high with three hits, including a triple, for Cincinnati.
When Dunn came up to face Brandon Webb with the bases loaded, the game tied at 2, and two outs in the eighth, the numbers seemed to favor the Diamondbacks. Dunn is a .186 hitter with the bases full and Webb hadn't given up a home run in 34 innings.
But the Arizona right-hander fell behind 3-1, and Dunn connected on the next pitch.
"I was trying to hit a groundball up the middle because they were kind of playing a shift on me," Dunn said. "It's amazing. When you don't try to hit homers, that's what happens."
A night earlier, Ken Griffey Jr. hit a game-tying three-run homer in the eighth and Cincinnati went on to win 4-3. The Reds, with just 11 road wins all season, improved to 4-2 on their trip to San Francisco and Arizona.
"There's a lot of character and heart here," Reds interim manager Jerry Narron said. "They want to turn it around. They want to play well the rest of the way."
Light-hitting Chris Snyder drove in both Arizona runs on three hits, and made a nice defensive play that ended up meaning little in the Reds' five-run eighth inning.
Webb (8-6) held Cincinnati to one run through seven innings and had a 2-1 lead before losing his control in the eighth. He walked Felipe Lopez on four pitches with one out, then gave up an infield hit to Olmedo. Casey followed with an RBI double to tie it at 2-2.
Griffey was walked intentionally to load the bases, and it looked like Webb might get out of it when catcher Snyder tagged out Lopez coming home on Joe Randa's slow roller up the third-base line for the second out.
With a shaky bullpen, Arizona manager Bob Melvin decided to stay with Webb to face the left-handed hitting Dunn.
"It's his game at 2-2 and Dunn hadn't had a good swing on him all night," Melvin said. "To Dunn's credit, he stayed behind the ball and didn't try to pull it the way he did before," Melvin said.
It was Dunn's fourth career grand slam and 23rd homer of the season.
Webb uncharacteristically left the ballpark immediately after the game and didn't talk to reporters.
The Diamondbacks have lost eight of nine home games, and have failed to score more than three runs in any of those games.
"That's the thing tonight again is the offense," an obviously perturbed Melvin said. "This (Cincinnati) is a staff whose ERA is last in the league and we're not scoring runs, and Brandon's out there pitching his butt off."
Snyder, hitless in his last 10 at-bats entering the game, singled in a run in the third and doubled in another in the fourth.
Webb allowed six runs and nine hits, struck out five and walked three in his third straight loss.
Todd Coffey (2-0) pitched 1 1/3 innings of scoreless relief behind starter Brandon Claussen to get the victory. Claussen allowed two runs and seven hits, struck out four and walked none in 5 2/3 innings.
The Reds went up 1-0 in the first. Lopez singled, moved to second when Olmedo bounced out to the pitcher, then scored when Casey singled.
Tony Clark led off the Arizona second with a double, advanced to third on Shawn Green's single, then scored to tie it at 1-1 on Snyder's two-out single.
Luis Terrero reached on a two-out, infield single in the fourth, then stole second and scored on Snyder's double over the head of Dunn in left field to put the Diamondbacks up 2-1.
Griffey went 0-for-3 to snap a 10-game hitting streak. ... The Reds are 8-9 since Narron took over from fired manager Dave Miley. ... Webb, 2-6 since winning his first six starts, had 14 groundouts in the first six innings. ... Arizona has been outscored by 63 runs in the seventh, eighth and ninth innings this year. ... The Diamondbacks have lost seven of their last eight home series.