The Reds placed All-Star shortstop Zack Cozart, who's been dealing with a sore right quadriceps, on the disabled list Saturday.
In a corresponding move, the club recalled from Class AAA Louisville RHP Kevin Shackelford.
Adam Conley turned in the best start of his 2017 campaign last time out, and he'll look to build on it as the Marlins and Reds continue a four-game set at 7:10 p.m. ET on Saturday at Marlins Park.
Conley (3-3, 5.62 ERA) held the Rangers scoreless over seven innings and walked none on Tuesday. It was a triumphant outing for the left-hander, who originally opened the season as Miami's fifth starter before being demoted after posting a 7.