Joey Votto had a two-run homer among his four hits, Adam Duvall had three hits off Mike Leake - his counterpart in one of Cincinnati's rebuilding trades - and the Reds beat the Cardinals 5-2 on
Thursday to complete a four-game sweep.
The Reds hadn't swept the Cardinals in four games since 2003 in Cincinnati, during the first season at Great American Ball Park. St. Louis has lost seven in a row overall for the first time since 2013.
Feldman (5-4) limited the Cardinals' slumping lineup to four singles in seven shutout innings. Matt Carpenter hit a two-run homer in the eighth off Austin Brice. Raisel Iglesias got his 12th save.
Duvall had an RBI double in the fifth, Scooter Gennett followed with an RBI single and Yadier Molina's throwing error let in another run. Votto connected off left-hander Tyler Lyons for his 16th homer an inning later, giving the Reds all the room they needed to finish the sweep.
The series highlight was Gennett becoming the 17th major leaguer to homer four times in a game during the Reds' 13-1 win on Tuesday night. In his next two games, he went 3 for 8 with three singles and an RBI.