The Braves had gone 2 for 20 with runners in scoring position in the past two games, but four runners scored from second base in the fourth on singles by Kurt Suzuki, Charlie Culberson, Johan Camargo and Dansby Swanson. They went 0 for 5 the rest of the way.
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Jackson Stephens (2-0) struck out two in 1 2/3 innings to earn the win. Iglesias earned a save for the second straight day and has converted his past six chances.
Braves starter Sean Newcomb allowed seven hits, three runs and two walks with six strikeouts in six innings. He has a 2.13 ERA in his past six home starts.
Cincinnati starter Luis Castillo retired the first 14 batters he faced before making 11 pitches to walk Freddie Freeman in the fourth. He gave up six hits, one walk and five runs — four earned — with four strikeouts in four innings.
Castillo was chased in the fifth. After Castillo left, Peraza misplayed a bases-loaded grounder that allowed a run to score and would’ve ended the inning.
The Reds made it 4-3 in the fifth when Peraza tripled and scored on Brandon Dixon’s single. Cincinnati led 2-0 on Billy Hamilton’s RBI single in the second and Peraza’s homer, his third, in the third.
Reds first baseman Joey Votto was ejected in the first inning for arguing a called third strike. It was the eighth of his career and the first since Sept. 9, 2015. Dixon took Votto’s place and went 1 for 2.
Reds: RHP Anthony DeSclafini (3-1, 4.09 ERA) will try to win his fourth straight start when Cincinnati opens a four-game home series Thursday against Milwaukee. RHP Junior Guerra will start for the Brewers.
Braves: RHP Julio Teheran (5-5, 4.52 ERA) allowed six hits and seven runs in 4 2/3 innings of his previous start, a 7-5 loss to the Orioles last Saturday. He will start opposite RHP Miles Mikolas when Atlanta opens a three-game series at St. Louis on Friday.