"We're digging our heels in," Cardinals manager Mike Matheny said after Jhonny Peralta singled in the winning run in the 10th for a 6-5 victory over the Cincinnati Reds. "That's what I love about this club."
Jay Bruce homered, doubled and knocked in four runs for the Reds, which gives him nine RBIs in four games. Brandon Phillips returned from left thumb surgery wearing a brace and went 0-for-4 with a walk.
The Reds have dropped seven of nine and are 18-30 in one-run games.
Peralta had three hits, and his RBI single in the first was just his second in 32 at-bats against the Reds this season. He also doubled and scored the tying run on A.J. Pierzynski's hit off Jumbo Diaz in the eighth.
"When we win like that, everybody gets excited," Peralta said.
Logan Ondrusek (3-3) entered with one out in the 10th and gave up consecutive singles to Matt Holliday, Matt Adams and Peralta. Ondrusek (strained right shoulder) had been activated from the disabled list earlier in the day.
"I wanted to go with more of the fresh arm there, and this isn't Logan's first time around the block and his first time here," manager Bryan Price said. "It just didn't happen tonight."
Bruce doubled off Rosenthal to tie it in the ninth after Hamilton drew a leadoff walk, then stole his 46th base and went to third with one out. Rosenthal was pulled after he walked the bases full with one out Sunday, and Seth Maness finished for his second save. Rosenthal has allowed four runs in 2 1/3 innings in his past three outings.
"It was actually not that bad -- we just walked the wrong guy," Matheny said. "You put that guy on base, [and] we're in straight defense mode trying to figure out how to limit the damage."
Maness retired Zack Cozart on a foul pop with the bases loaded to end the top of the eighth.
Bruce's three-run homer, his 14th shot of the season, capped a four-run fifth against Justin Masterson for a 4-3 lead. Bruce also set a franchise record with his 890th game in right field, which broke the mark set by Ival Goodman from 1935 to 1942.
Reds: Closer Aroldis Chapman was unavailable and is day-to-day with shoulder soreness a day after he walked four straight batters before getting pulled in the first game of a doubleheader at Colorado. 2B Phillips played his fourth straight game, including rehab games. "If he's physically OK, he's going to play a lot," Price said.
Cardinals: RHP Michael Wacha, on the DL since mid-June with a shoulder injury, got positive reviews from his latest bullpen session Monday.
Reds: Alfredo Simon (12-8, 3.28) makes his 14th appearance against the Cardinals and his first start. He is 15-3 with a 2.70 ERA in 18 career starts before the All-Star break and 0-5 with a 5.46 ERA in six starts after the break.
Cardinals: John Lackey (1-1, 6.18) makes his fourth start since coming from Boston in a deadline deal, and he faces the Reds for just the second time in his career. He is 12-8 with a 3.19 ERA overall and 2-0 with a 1.77 ERA against NL teams this year.
Holliday, Hamilton and Oscar Taveras made nice catches at the wall in left, center and right, respectively. ... Actor and Cardinals super fan Jon Hamm, who grew up in suburban St. Louis, bounced a soft first pitch to Hall of Famer Ozzie Smith. ... Leake, who also doubled, has two homers and four RBIs this season.
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