A half hour before throwing the first pitch, the Padres' ace was given two injections of Novocain -- he had two wisdom teeth pulled Friday -- and two shots of lidocaine in his non-throwing left hand, which he cut Monday morning while taking out the trash.
"It was an ER in there at 6:30, getting me ready to go out," Peavy said after the Padres beat the Diamondbacks 5-3 Tuesday night to take a 5½-game lead in the NL West.
Joe Randa hit a go-ahead home run leading off the sixth inning and Brian Giles had a three-run shot in the first.
"I had Novocain from my waist up tonight," Peavy said. "Nothing really felt good tonight. Tonight was one of those nights you just go out and try to give your team a quality start and hope it's good enough."
It was, and the Padres pulled to one game under .500 (65-66), making this the latest in a season a team has led a division with a losing record. The Diamondbacks and Los Angeles Dodgers are tied for second.
Peavy (12-6) was a mess physically. On Friday, he had two wisdom teeth and an abscessed molar removed. On Monday morning, he cut his left hand while stuffing a bag of trash into a garbage can, requiring a couple of stitches and a tetanus shot.
"I just appreciate that we had some docs who took care of me," Peavy said.
The dentist who'd been treating Peavy, Dr. Fred Larson, was summoned from La Jolla shortly before the game.
"The orthopedics said they were not good giving shots in the mouth," Peavy said.
The right-hander allowed Troy Glaus' two-run homer in the first and Luis Gonzalez's solo shot in the fourth among his seven hits.
Peavy made way for Scott Linebrink with runners on first and third and two outs in the seventh, and the reliever induced Royce Clayton to ground out. Peavy allowed three runs, struck out eight and walked two.
The Diamondbacks beat San Diego 7-5 on Monday night.
"This was a big, big night for the boys. Let's hope we come out tomorrow with the same intensity and try to win this series," Peavy said.
Said Gonzalez: "He's a very intense guy. Every guy would love to have pitchers like that on your team because he's going to go after you."
Trevor Hoffman pitched the ninth for his 34th save in 36 chances, and the 427th of his career.
Although Peavy's cut was protected by a pad, he couldn't hold onto his bat as he swung at the first pitch he saw from Brad Halsey in the second inning. He bunted the second pitch foul, then struck out.
"Jake was feeling the effects of everything that was going on between his teeth and hand, but he battled out there," manager Bruce Bochy said. "He did a nice job."
With the score tied at 3-all, Randa drove a 1-1 pitch from Halsey (8-12) into the seats in the sixth. It was Randa's 16th, tying his career high.
Miguel Olivo hit a sacrifice fly with the bases loaded off Tim Worrell in the eighth.
Halsey's scheduled start was moved up a day after right-hander Javier Vazquez was scratched due to stomach flu. The left-hander allowed four runs and six hits in six innings.
Halsey also allowed Giles' three-run shot to right with one out in the first, which gave San Diego a 3-2 lead. Giles fell behind 0-2, then worked the count full before hitting his 14th. Eric Young and Mark Loretta were aboard on singles.
Glaus' homer, his 30th, came with two outs in the first and Clayton aboard on a single.
"Giles is a dangerous hitter," Gonzalez said. "He's not a good guy to have up there right after we score two runs."
Gonzalez hit his 20th homer when his fly ball curved around the right-field foul pole leading off the fourth, tying the game at 3-3. The Diamondbacks joined the Texas Rangers as the only major-league teams to have five players with at least 20 homers.
If Vazquez (10-13, 4.59) feels better, he'll start in the series finale on Wednesday. ... Padres SS Khalil Greene was 0-for-3 with an intentional walk in his first game back from the 15-day DL. He had been out since breaking his left big toe on Aug. 14. ... Indy Racing League driver Alex Barron threw out the ceremonial first pitch, and NASCAR driver Jimmie Johnson, who's from nearby El Cajon, received an award before the game from the San Diego Hall of Champions. ... Kalen Pimentel, who helped Rancho Buena Vista finish third in the Little League World Series, enjoyed hanging out with Glaus in the clubhouse and on the field before the game. Pimentel's father, Joe, coached Glaus at Carlsbad High in northern San Diego County. The senior Pimentel also used to be a batting practice pitcher for the Padres.