"Tony will start on Sunday, which will make it [Mike] Leake, [Johnny] Cueto and [Alfredo] Simon in Washington," Reds manager Bryan Price said.
In six starts, Cingrani is 2-2 with a 3.34 ERA over 32 1/3 innings pitched.
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.