SAN DIEGO -- The D-backs snapped a pair of losing streaks this past week, and on Sunday afternoon they were nine outs away from recording their first back-to-back wins since May 10-11.

The Padres, though, came alive in the seventh inning. They scored three times off Matt Peacock and hung on to beat the D-backs, 5-4, in the series finale at Petco Park.

• Box score

The D-backs dropped two of three in the series and are now 0-15-1 in their past 16 series.

The Padres built a 2-1 lead behind the pitching of Yu Darvish before the D-backs managed to score three runs in the top of the seventh inning off Tim Hill to take a 4-2 lead.

Here are a couple of things to know about this game:

Gallen will be unleashed
Right-hander Zac Gallen made his third start since returning from an elbow sprain and appeared to try and talk D-backs manager Torey Lovullo into leaving him in the game when Lovullo took him out with two outs in the fifth.

Gallen threw 58 pitches in his first start back, then 68 last time out before tossing 84 on Sunday before Lovullo pulled the plug.

The reason for the gradual buildup is that Gallen did not go on an injury-rehab assignment. He instead pitched in simulated games at Salt River Fields before being activated.

"From what I understand, it’s supposed to be the last one," Gallen said of being limited in pitch count. "The next one should be full go. I’m pretty pumped about that."

Gallen was OK on Sunday, but he still is searching for his pre-injury form. Warming up in the bullpen before the game, he felt his command was off a bit. He knew the first inning could be a struggle.

It was -- the Padres scored a pair of runs against him, including a leadoff homer by Tommy Pham.

"I felt like it got a little bit better after the first inning or so,” Gallen said. “It just sort of started to settle in a little bit."

The D-backs were limited in the bullpen
The Arizona bullpen was taxed heavily in the first game of the series, when starter Corbin Martin lasted just one-third of an inning. So Lovullo was hoping to get two innings out of Peacock.

The right-hander was impressive in his first inning, using his sinker to retire the Padres in order on three groundouts in the sixth.

In the seventh, though, Peacock’s sinker was elevated and the first five batters in the inning reached base. After that he went more to his slider and struck out the next three batters to end the inning.

It's an adjustment he'll want to make quicker next time out, especially now that it appears he's going to be pitching out of the bullpen rather than starting.

"Sometimes I get a little amped up and try to throw the ball too hard,” Peacock said. “And I elevate, and I think that was the difference between the first inning vs. the second inning [of work].

“I feel like in the first inning, my velocity was a little lower. I was keeping the ball down and getting some results quick vs. the second inning.”