The Mets, who took consecutive games at Petco Park Thursday and Friday, have beaten the Padres four out of five times this season, and when the two teams play the third game of a four-game series at Petco Park on Saturday, New York will be even more formidable with the expected arrival of Travis d'Arnaud.
The 24-year-old was the centerpiece of the trade that sent R.A. Dickey to the Blue Jays in December and is the Mets' second-ranked prospect, baseball's highest rated catcher and the 22nd ranked player on MLB.com's 2013 Prospect Watch.
He will replace starting catcher John Buck, who is on paternity leave and can miss up to three games.
Since being promoted to Triple-A Las Vegas on Aug. 9, d'Arnaud has gone 8-for-20 with one home run and four RBIs and has walked nine times. It is likely that he will start all three games, and he could stick around for the rest of the season.
"It will be nice to see him in a New York Mets uniform," Mets general manager Sandy Alderson said. "At the end of three days, we'll see where we are."
d'Arnaud will be up against the Padres, who have dropped eight of their last 10, and will count on starter Edinson Volquez to help them bounce back.
Volquez has been unpredictable this season on the mound, and his 5.80 ERA is the highest among qualified starters this year, while allowing 10.3 hits per nine innings. He has allowed four or more earned runs in 11 of his 25 starts, including his last start in which the Rockies tagged him for eight runs on nine hits in 4 1/3 innings.
The Padres have said Volquez will remain a part of the rotation for the time being, but an influx of pitchers is likely to join the team when the rosters expand on Sept. 1.
"Right now, we're keeping our rotation in order as we go through the week," Padres manager Bud Black said. "We'll see. We talk about our players all the time, on an everyday basis, with the coaches and with [general manager Josh Byrnes and assistant general manager A.J. Hinch].
"It's an evaluation process every day."
Jenrry Mejia, who will start opposite Volquez on Saturday, has been a pleasant surprise for the Mets this season, with a record of 1-2 with a 2.22 ERA. He allowed three runs in six innings but suffered a loss during his last start against the Dodgers.
Mets: Hefner may be heading for surgery
Alderson said Tommy John surgery could be a possibility for injured right-hander Jeremy Hefner.
Hefner has received two exams on his right elbow last week -- one of which revealed a partially torn MCL -- and is scheduled for a third on Monday. Tommy John is usually associated with UCL tears, but Hefner may have his MCL replaced with a similar surgery.
"That is a possibility, yeah," Alderson said of surgery. "I don't know how serious a possibility, but we have not been able to rule that out at this point."
Padres: Quentin may be done for season
If left fielder Carlos Quentin's strained right knee doesn't feel better after 10 days of rest, the Padres are preparing to shut him down for the rest of the season.
He hasn't played since July 30, but had been doing some light exercises and felt soreness after running last weekend in Cincinnati.
Quentin had surgery in October on the same knee and could need surgery again.
• Friday was the first time in 11 home games since July 13 that a Padres starter allowed more than than two earned runs. Ian Kennedy allowed five runs on seven hits, including three homers.
• Padres outfielder Will Venable is on a career-best 13 game hitting streak. He has four home runs this season against lefties, including one against Jon Niese on Friday, after hitting just one all of last year.
• Mets outfielder Juan Lagares was out of Friday's starting lineup so he could spend extra time working alongside hitting coach Dave Hudgens. Lagares' skid reached 1-for-22 after he entered in defense in the eighth inning and grounded out in the ninth on Friday. He has struck out seven times during the slump, and the team believes he is lunging at too many pitches out of the zone.
• Mejia has two appearances in his career against the Padres, and he threw a scoreless inning out of the bullpen in each.
Jamal Collier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.