Jeff Manship, 30, and Kyle Crockett, 23, have each been called up from Triple-A Columbus.
Manship is 0-2 with two saves and a 1.99 ERA in 23 appearances in Triple-A this season. Right-handed hitters are batting just .197 against him. Crockett struggled when he was first sent down to Triple-A on April 11 but has been excellent recently, posting a 1.04 ERA and nine strikeouts in his last 8 2/3 innings pitched.
To make room on the active roster, utility man Zach Walters has been optioned down to Triple-A and starting pitcher Shaun Marcum has been designated for assignment.