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On the fringes of the NL playoff picture, the Arizona Diamondbacks would benefit from ending a 10-game road trip with a winning record.

The Diamondbacks try to do just that Sunday when they conclude a three-game series against the San Diego Padres.

Arizona snapped a seven-game skid against San Diego with an 8-5 win Saturday. The Diamondbacks recorded 15 hits including four homers -- two by while Jason Kubel. Justin Upton and Aaron Hill also went deep.

The Padres had outscored Arizona (69-71) 48-25 during their winning streak in this NL West rivalry, but San Diego (65-75) fell behind early Saturday as starter Casey Kelly failed to make it out of the third, allowing six runs and eight hits.

Chase Headley went 0 for 4 to snap a nine-game hitting streak during which he batted .405 with four homers and 18 RBIs.

With the impressive power display, the Diamondbacks moved within 5 1/2 games of St. Louis for the NL's second wild card.

"It's nice to finally beat these guys," said Kubel, who had batted .140 (6 for 43) in his previous 14 games. "It seems like a really long time. We really need wins, as many as we can get, and this is a start."

Arizona's offense is doing its part after a slow start to the road trip, having plated 35 runs over the last five games while hitting .320. Hill is batting .342 (13 for 38) with two homers and four doubles in his last nine.

The Diamondbacks, who split a four-game set against the Los Angeles Dodgers to begin their trip before taking two of three from San Francisco, will send Patrick Corbin (5-6, 4.13 ERA) to the mound Sunday as he tries to snap a three-start winless drought.

Corbin gave up four runs -- all in the first inning -- and seven hits while striking out six in five innings Monday's 10-inning, 9-8 loss to the Giants. It marked the third time in four starts that he'd allowed four runs.

The rookie left-hander has made one start and one relief appearance against the Padres (65-75) this year. The start came Aug. 24, when he allowed four runs and nine hits in four innings of a 5-0 defeat.

Corbin will try to help the Diamondbacks hand the Padres back-to-back home losses for only the second time since mid-July. San Diego had won 17 of 22 at Petco Park before Saturday's defeat.

Andrew Werner (1-1, 3.00) will look to continue the promising start to his career when he takes the mound for the Padres in the series finale.

Werner gave up two runs and five hits and struck out a career-high eight in six innings of Monday's 4-3, 11-inning loss to the Dodgers.

The rookie left-hander has given up two runs in six innings in all three of his starts while holding opponents to a .203 batting average.