Nyjer Morgan grounded to shortstop Willie Bloomquist, whose play was a force at home, and Morgan slowed up and turned his head to watch the play at the plate, allowing D-backs catcher Henry Blanco to turn a 6-2-3 double play and escape the jam.
Blanco came through with the game-winning hit in the bottom of the inning, as the D-backs used three two-out RBI singles to defeat the Brewers, 4-3.
"I don't know what he was looking for. He probably thought I wasn't going to make that throw," Blanco said of Morgan. "But, you know, I have to try, and we got him. It worked out pretty good for us.
"It was time to wake up a little bit. We needed to play better, and we're showing some life."
After the game, Morgan admitted the lapse in judgment that cost his team another scoring opportunity and gave the D-backs a heap of momentum.
"I thought Rick [Weeks, the runner at third] was going to blast him, to tell you the truth," Morgan said. "I was looking back to see some action, got caught up looking at the play and that cost me a little bit of speed there."
Pitching in his first game in more than a month after a disabled-list stint, D-backs starter Daniel Hudson lasted five innings, allowing two earned runs on six hits.
"I got a little tired at the end," Hudson said. "I threw a lot of pitches and I lost command there, but overall I felt pretty good. It was a positive step to throw a lot of strikes and take that one step at a time."
Brewers starter Randy Wolf pitched admirably as well, tossing 5 2/3 innings, giving up three runs (two earned) on seven hits.
Brad Ziegler, Daniel Hudson and J.J. Putz each threw clean innings to close out the game for the D-backs.
"That's good for their confidence," D-backs manager Kirk Gibson said. "We've used them a lot. We'll have to go longer or else they'll get tired."
Besides Blanco, Jason Kubel and Ryan Roberts also contributed two-out RBI singles in the critical D-backs' sixth.
"We have all the confidence in this clubhouse," Roberts said. "Now it's keep doing what we do best. It's good to get two out of three at home. We hadn't been winning at home, and it's the best place to play."
Each team put runners in scoring position twice early in the game, but neither could capitalize.
Paul Goldschmidt finally broke the scoreless tie in the fourth with a homer on a 3-2 fastball off the center-field batter's eye to put his team ahead, 1-0.
The lead was short-lived for the D-backs, though, as Cody Ransom and Corey Hart delivered RBI singles in the fifth to put the Brewers on top, 2-1.
Josh Bell pinch-hit for Hudson in the bottom of the fifth to put an end to the right-hander's day.
"I thought it was fine," Hudson said. "I didn't feel too tired. I felt like I could've gone back out there. But there is no reason to push it in the first start back."
Mike Zagurski came out of the bullpen for the D-backs in the sixth, walking three and serving up an RBI single to Taylor Green before Gibson went to Bryan Shaw, who induced Morgan's tide-turning double-play grounder.
"The play of the game was the double play," Gibson said. "We played him right and caught Morgan looking over his shoulder -- that was a huge plus. It kind of felt like old times, I hope it is. Really gritty win for us."