"It was kind of news to us when he got down there and had the shoulder issue," manager Bryan Price said.
Cingrani hasn't always been forthcoming with injuries, as shown last season, when he didn't disclose a back injury for a couple of weeks before going on the DL in August.
Moved to the bullpen shortly before his demotion, Cingrani was 2-8 with a 4.55 ERA in 13 games -- including 11 starts -- for the Reds before being sent to Louisville to get back his command. He had yet to pitch for the Bats.
"If there's an issue with his shoulder, we'd certainly like to rectify it and get him back to throwing the ball the way he can, because he could really help us," Price said.
Mark Sheldon is a reporter for MLB.com. Read his blog, Mark My Word, and follow him on Twitter @m_sheldon. This story was not subject to the approval of Major League Baseball or its clubs.