(Photo credit: Joe Camporeale-Imagn Images)

Ryan O'Hearn tied the game with a leadoff homer in the ninth inning, Jose Iglesias singled in the go-ahead run, and the San Diego Padres beat the Arizona Diamondbacks 3-2 in the decisive game of a three-game series on Wednesday in Phoenix.

O'Hearn went deep off Kyle Backhus (0-2), his first homer since being acquired by San Diego at the trade deadline. Xander Bogaerts then doubled and was sacrificed to third before scoring on Iglesias' line-drive single to right.

Corbin Carroll hit a 443-foot homer in the first inning and Alek Thomas added a sacrifice fly in the second to give Arizona a 2-0 lead, but the Diamondbacks had one hit after Tyler Locklear's single in the second.

Padres reliever Adrian Morejon (9-4) gave up one hit in two scoreless innings. Mason Miller struck out three in the ninth while working around a two-out walk for his 21st save, his first since joining San Diego in a deadline deal.

Freddy Fermin had three hits for the Padres, who have won nine of 11.

Bogaerts homered in the seventh to slice Arizona's lead to 2-1. He went deep for the second consecutive game and has hit six of his nine homers since June 19.

The Diamondbacks have lost two in a row and eight of 11.

Arizona starter Anthony DeSclafani gave up three hits in 4 1/3 scoreless innings during his third start of the season. He struck out four, issued no walks and was removed with a 2-0 lead.

Nestor Cortes gave up two runs on three hits in 4 2/3 innings in his first start for the Padres after being obtained at the deadline. He walked three and struck out three.

Carroll hit an 0-2 pitch for his 23rd homer for a 1-0 lead as the second batter in the first inning.

The D-backs loaded the bases with no outs in the second when Locklear beat out an infield single before Cortes hit Blaze Alexander and James McCann with inside pitches. However, Arizona scored only on Thomas' sacrifice fly.

After going 0-for-13 with runners in scoring position in a 10-5, 11-inning loss Tuesday, the D-backs were 0-for-4 in those situations on Wednesday.

--Field Level Media