Bailey made six rehab starts for Louisville, including on Monday when he threw 98 pitches over 4 1/3 innings. The Reds expected he would be ready for Sunday, but kept from officially committing until after the right-hander threw in his side bullpen session.
"He felt even better on the side than last time," Reds manager Bryan Price said. "I don't think there is anything standing in the way, no impediments to how he feels physically. He feels like he's sharp. He's got all his pitches available to him."
Bailey, 30, had surgery to repair a torn flexor mass tendon near the same elbow in August 2014. He made two starts last season before tearing the ulnar collateral ligament.
Mark Sheldon has covered the Reds for MLB.com since 2006, and previously covered the Twins from 2001-05. Follow him on Twitter @m_sheldon and Facebook and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.