SAN DIEGO -- Justin Upton homered to left-center with two out in the bottom of the eighth Wednesday night to give the San Diego Padres a 3-2 victory over the Arizona Diamondbacks at Petco Park.

Upton's third homer as a Padre -- and his second in as many nights -- came on the first pitch he saw from Diamondbacks' right-handed reliever Ronald Delgado and travelled 383 feet to snap a 2-2 tie.

Padres right-handed reliever Joaquin Benoit (3-0) picked up the win. Right-handed closer Craig Kimbrel got his third save as the Padres won their 12th straight home series dating back to last July.

Delgado (0-1) suffered the loss.

Padres right-handed starter Brandon Morrow allowed two runs on seven hits with a walk and five strikeouts over seven innings. Arizona's right-handed starter Chris Anderson allowed two runs on eight hits and a walk with five strikeouts over six innings.

Padres' nemeses Ender Inciarte and Paul Goldschmidt combined talents to give the Diamondbacks a 2-0 lead in the top of the first.

Inciarte singled to open the game to stretch his hitting streak against the Padres to seven straight games. The left fielder moved to second after Padres right fielder Matt Kemp made a leaping catch of center fielder A.J. Pollock's drive just in front of the foul pole. Inciarte then stole third.

But he trotted home as Goldschmidt drove a 2-2 fastball from Morrow 383 feet into the right-field stands for a two-run homer. The homer doubled as the 500th hit of Goldschmidt's career. It was also Goldschmidt's ninth career homer against the Padres.

The Padres halved the lead in the bottom of the second.

Upton opened the inning with a single, stretching his hitting streak to all 10 games this season and 12 straight games dating back to the end of last season. Upton raced home from first on a double inside the first-base bag by Padres first baseman Yonder Alonso.

Arizona missed an opportunity to expand its lead in the top of the fourth.

Inciarte doubled to lead off the inning, marking the sixth straight game in which he doubled against the Padres. But with one out and Goldschmidt at the plate, Inciarte was thrown out by Padres catcher Derek Norris trying to steal third.

Goldschmidt and right fielder Mark Trumbo then hit back-to-back singles before Morrow retired third baseman Jake Lamb on a fly to left to end the inning.

With Morrow retiring 10 straight Diamondbacks following Trumbo's single in the third, the Padres finally tied the score at 2-2 in the bottom of the sixth.

Center fielder Wil Myers opened the inning against Anderson with a double down the right-field line and moved to third on Norris' line drive single to center. Myers scored on Kemp's sacrifice line drive to the warning track in right.

The Padres missed a chance to take the lead when Norris was thrown out at the plate by center fielder Pollock trying to score on third baseman Will Middlebrooks' two-out, line-drive single.

NOTES: The Diamondbacks promoted OF Yasmany Tomas from Triple-A Reno on Wednesday. The 24-year-old Cuban, who received a six-year, $68.5 million from the Diamondbacks in December, was 4-for-21 in Triple-A with a double, a home run and three RBIs. ... Padres RHP Ian Kennedy threw a bullpen on Thursday, just seven days after going on the 15-day disabled list with a "mild" left hamstring strain. He is expected to throw a second bullpen on Friday and make the first of two possible rehab starts Monday. ... Padres 2B Jedd Gyorko, who is off to a 3-for-21 start, returned to the lineup after Yangervis Solarte started the three previous games.