ATLANTA — Craig Counsell couldn't ask for much more from his bullpen.
Well, maybe just one more out.
Four relievers combined for five scoreless innings in relief of Mike Fiers before Kintzler (0-1) gave up two hits and one run in the 11th.
"Every guy that went out there, they did their job," Counsell said.
"We were just one out away."
Peterson hit the first pitch from Kintzler to left field to drive in Alberto Callaspo from third base. Left fielder Ryan Braun and center fielder Carlo Gomez didn't bother to field the ball as Callaspo scored and Braves players swarmed Peterson near second base.
"It was great," said Peterson, who said teammates covered him with dirt and water. "Probably one of the most fun times I've ever had playing baseball. It was awesome."
With one out in the 11th, Kintzler walked Callaspo. Andrelton Simmons' sharply hit grounder hit third-base umpire Chad Fairchild and bounced into left field instead of heading toward the left-field corner. Runners advanced to second and third on pinch-hitter Eric Young Jr.'s grounder to Kintzler.
Kintzler's first pitch to Peterson ended the game.
"I don't know how low it was but he went down and got it," Kintzler said.
Milwaukee blew a scoring chance in the ninth. Jason Grilli gave a two-out walk to pinch-hitter Jason Rogers. Luis Sardinas singled to right field but was thrown out at first. Simmons took the cutoff throw from Markakis toward third base and quickly threw to first, where Freeman applied the tag as Sardinas slid back too late.
"It's a great play from Simmons," Counsell said. "I think it's a play you learn a lot of lessons on."
Luis Avilan (2-0) pitched the last 1 1/3 innings for Atlanta, including getting a double-play with runners at first and third to end the 10th.
Atlanta's Shelby Miller and Fiers each allowed two runs and seven hits. Fiers lasted five innings.
Gomez doubled to lead off the game and scored on Braun's single. Martin Maldonado's single drove in Aramis Ramirez in the fourth.
Milwaukee left-hander Will Smith allowed one hit in 1 2/3 innings in his first appearance since being ejected for having a foreign substance on his arm in Thursday's 10-1 loss to the Braves. Smith, appealing his eight-game suspension imposed by Major League Baseball, struck out the side in the eighth.
Brewers: Counsell said RHP Wily Peralta, who left Friday night's win after four innings due to tightness in his left side, should make his next scheduled start on Wednesday against the Giants. ... Ramirez remained in the game after being hit by a pitch on his left hand in the sixth.
Braves: LHP Alex Wood, who was scratched due to a stomach virus on Friday, worked out before the game. Manager Fredi Gonzalez said Wood may be available in the bullpen on Sunday "in case we get in one of those crazy games." Wood is scheduled to start Wednesday at the Los Angeles Dodgers. ... 3B Chris Johnson (broken left hand) may take batting practice with the team at Turner Field on Sunday as he prepares to begin a rehab assignment with Triple-A Gwinnett on Monday.
Brewers: RHP Jimmy Nelson, who snapped a four-game losing streak with a win at Detroit on Tuesday, will face the Braves for the first time.
Braves: RHP Mile Foltynewicz will make his fifth start, including his fourth at Turner Field, where he is 2-1 despite a 6.46 ERA. He'll face the Brewers for the first time.