Reds rookie left-hander Tony Cingrani was scratched from his Sunday start because of a lower right back strain he sustained during his previous outing, and Greg Reynolds will take his place in the rubber match against the Brewers at Great American Ball Park.
Cingrani threw 3 2/3 innings against the D-backs before exiting on Tuesday, and his Friday bullpen session was cut short when he felt soreness after just 12 pitches. Reynolds arrived in Cincinnati on Saturday from Triple-A Louisville, and he will take the mound Sunday to try and win the three-game series for the Reds.
Reynolds will be pitching on his regular rest.
"We're all about routines. It definitely makes a difference when you stay on schedule. If you have a couple of extra days sometimes, you don't feel as sharp. This is right on schedule."
The 28-year-old Reynolds was drafted No. 2 overall by the Rockies in 2006 and is 12-3 with a 2.42 ERA this season at Louisville. He tossed a complete game against Rochester on Tuesday, allowing just one run on five hits.
He pitched in the big leagues for the Rockies in 2008 (2-8 record, 8.13 ERA) and 2011 (3-0, 6.19) and made one start this season for the Reds. The right-hander took the loss against the Giants on July 23 after throwing five innings and allowing five earned runs on eight hits.
The Brewers will counter with Marco Estrada, who has not seen the Reds this season. In eight career appearances against Cincinnati, including four starts, Estrada is 1-3 with a 4.24 ERA. In 34 innings, he has allowed 30 hits and nine home runs -- the most of any team he has faced in his career.
The 30-year-old right-hander opened August with two solid starts, but in his last outing on Monday, he took a no-decision after allowing four earned runs on eight hits in six innings against the Cardinals.
Estrada was frustrated after the Brewers' 8-5 loss, especially about a sixth-inning pitch that resulted in a two-run Jon Jay home run.
"I kept throwing him curveball after curveball, and on the pitch before, it looked like he took a really good swing, but he fouled it off," Estrada said. "That's when I'm like, 'OK, I need to switch it up.' You know, they called another curveball, and inside my head, I didn't want to throw it, but I said, 'OK, let's just make a good pitch.' The pitch wasn't terrible, but he had just seen so many. When you see the same pitch over and over, eventually, it's going to get hit. That's what happened. ...
"It's just really frustrating right now. I keep thinking about that pitch over and over. I wasn't convinced with that pitch."
Reds: Bruce set to return Sunday after Saturday rest
Jay Bruce was out of Dusty Baker's lineup Saturday, but said he will be back for Sunday's series finale against the Brewers.
"This is it, pretty much, with the stretch of games we have left and going on the road trips to St. Louis and Pittsburgh. There's really not any other opportunity to get a rest day," Bruce said. "[Baker] told me to take advantage of this one."
The outfielder is hitting .266/.322/.480 this season with 24 home runs, 34 doubles and 81 RBIs. Bruce went 0-for-4 in the series opener Friday and is 3-for-19 on the homestand. He has just two home runs in August, coming on back-to-back days, Aug. 6-7.
Brewers: Davis extends hitting streak to 10 games
Khris Davis is making the most of his late-season opportunity with the Brewers.
The 25-year-old outfielder extended his hitting streak to 10 games with an RBI double in the first inning Saturday. Davis -- starting regularly in left field due to Ryan Braun's suspension -- is hitting .392 (20-for-51) in August with six home runs and 14 RBIs in 17 games.
Davis was selected by the Brewers in the seventh round of the 2009 Draft, and he is hitting .338 with eight homers and 17 RBIs in 39 games in his first big league season.
• The Reds lead the season series against the Brewers 9-6, including a 6-2 mark at Great American Ball Park.
Kevin Massoth is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.