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03/03/11 7:43 PM ET

Padres' bullpen shines to set up walk-off win

PEORIA, Ariz. -- Relievers Mike Adams, Luke Gregerson and Ernesto Frieri each turned in a scoreless inning and Minor Leaguer Jesus Guzman hit a walk-off homer as the Padres defeated the D-backs, 6-4, on Thursday at the Peoria Sports Complex.

Justin Upton hit his first home run of the spring and former first-round Draft pick Jarrod Parker threw two scoreless innings for the D-backs.

Oscar Salazar and Mike Baxter each had two hits, and rotation hopeful Dustin Moseley didn't allow a run over two innings for the Padres.

Upton's homer came in the fourth inning after teammate A.J. Pollock doubled. The big fly came off Padres reliever Greg Burke.

The D-backs got two hits from Upton and a double from Ryan Roberts, who lifted his spring average to .667.

Will Venable and Eric Patterson each had doubles for the Padres. Cedric Hunter drove in the tying run with a fielder's choice in the seventh inning.

Arizona starting pitcher Daniel Hudson allowed one unearned run in two innings. He allowed four hits and two walks.

The Padres were 0-for-13 with runners in scoring position on Thursday before Guzman's hit.

"We saved the best for last," joked Padres manager Bud Black. "We just couldn't get that big hit. But that was a big hit and a good swing by Guzie."

Up next: The Padres will make their first trip to Salt River Fields at Talking Stick on Friday for their second game in as many days against the D-backs at 12:10 p.m. PT. The Padres are entering the point in which their starting pitchers are making their second turn in Cactus League play. Tim Stauffer and rotation hopeful Cory Luebke each figure to get two innings.

Ian Kennedy will get the start for the D-backs, with regulars like second baseman Kelly Johnson, shortstop Stephen Drew and center fielder Chris Young expected to be back in the lineup after receiving Thursday off. Mike Hampton and Juan Gutierrez are also slated to see action on the mound.

Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.