SAN DIEGO -- The D-backs rolled through a stretch of games against the Dodgers and Rockies, but it's the pesky Padres who give them the most problems these days.
Hunter Renfroe and Austin Hedges homered to lead the Padres past the D-backs, 4-2, on Monday night at Petco Park. San Diego has now won three of the last four games between the two teams, including a series win a little more than a week ago at Chase Field.
The loss, combined with the Brewers' 3-0 win over the Pirates on Monday night, kept the D-backs' magic number to clinch a postseason berth stuck at six. Any combination of Arizona wins or Milwaukee losses totaling six would do it.
The D-backs were 2-for-7 with runners in scoring position and left nine men on base.
"I felt like we built some innings and we had some good situations where the right guys were up at the right time, but we just didn't execute," D-backs manager Torey Lovullo said.

Renfroe, in his first at-bat since being recalled from Triple-A El Paso earlier in the day, got the Padres rolling with a three-run homer in the first.
"It's obviously good to do it on the first at-bat, but obviously just to do it in general, to help the team win," Renfroe said. "To do it to get the win against Arizona, a really good club, it's special."

Hedges added a solo shot in the second, which was enough to make a winner of Luis Perdomo (7-10), whose streak of 10 straight starts of at least six innings came to an end in the victory. The right-hander allowed two runs on four hits over 5 1/3 innings while tying a career high with six walks.
"Love the fact that he made big pitches," Padres manager Andy Green said. "… He made big pitches when he had to for most of the day. He put himself in really tough situations. But I think you've got to be encouraged that he keeps getting out of those situations."

Patrick Corbin (14-13) took the loss for the D-backs. It was just his second loss since Aug. 6, with both of them coming at the hands of the Padres.
MOMENTS THAT MATTERED
Margot says no: The D-backs scored a pair of runs in the third and they would have done more damage had it not been for a great catch by Manuel Margot in center. With two outs and runners on first and third, Daniel Descalso hit a liner to center that Margot made a diving catch on. Statcast™ rated it a five-star grab with a 12 percent catch probability and Margot covered 41 feet in just three seconds.

Stammen stems tide:Craig Stammen faced quite a jam when he was summoned from the bullpen in the sixth. The D-backs had loaded the bases with just one out when Green decided to take out Perdomo. Stammen got Chris Herrmann to fly out to shallow right and then pinch-hitter Rey Fuentes popped out to first, stranding the bases loaded. It was the eighth time this year Stammen entered the game with the bases loaded and only two of those runners scored and they came thanks to an error.
"It's getting, honestly, borderline stupid," Green said. "You don't get out of bases loaded, less than two outs over and over and over and over again. Nobody does that, no matter how good you are. … And he's done that time and time again. A pitcher like that makes a manager look really smart."

PERALTA EXITS EARLY
D-backs outfielder David Peralta left the game in the sixth with tightness in his right quadriceps muscle. Peralta said he felt the tightness while running to first base in the third inning and then again when he made a sliding stop on Margot's double in the fifth.
After Peralta told the Arizona training staff about the tightness, they recommended that he leave the game and get treatment as a precaution.
"Hopefully," Peralta said when asked if he would be able to play Tuesday night. "It depends on the treatment and how my body reacts tomorrow, but I feel normal. So we'll see what's going to happen tomorrow."
QUOTABLE
"It was humbling. You go down for a reason. You either grow from it or you fail from it. Obviously, I wanted to grow from it and become a better player." -- Renfroe, on being sent to Triple-A
SOUND SMART WITH YOUR FRIENDS
San Diego managed only four hits in the victory, compared to five for the D-backs. The Padres are now 3-20 when they have four or fewer hits and 14-64 when they are outhit.
UPON FURTHER REVIEW
Jake Lamb began the fourth by scalding a ball 104 mph off Perdomo. The right-hander chased the ball toward the first-base line, where Lamb jumped to avoid him and a possible tag. Perdomo flipped the ball with his glove to William Myers at first. Myers stretched for the ball and kept his foot on the bag, but Lamb was ruled safe and credited with an infield single. After the Padres challenged, the call was overturned, and Perdomo was left with a bruise and a terrific play.

The Padres had another successful challenge in the bottom of the frame, when Matthew Szczur was ruled safe after an overturned call on the back end of a double play.

WHAT'S NEXT
D-backs:Zack Godley will look to keep his positive roll going when he starts at 7:10 p.m. MST Tuesday night against the Padres at Petco Park. In his last four starts, the right-hander is 3-0 with a 2.33 ERA.
Padres: Left-hander Travis Wood starts the series' second game at 7:10 p.m. PT Tuesday. After posting a 3.86 ERA in his first seven starts with San Diego, Wood has allowed 15 earned runs across 4 1/3 innings in his past two.
Watch every out-of-market regular-season game live on MLB.TV.