McClellan went 0-1 with a 7.71 ERA in seven relief appearances with the Rangers. In six games with Round Rock, the righty has logged a 2.57 ERA.
The Rangers have 10 days to trade, release or outright McClellan to the Minors.
Zack Meisel is a reporter for MLB.com. Follow him on Twitter @zackmeisel. This story was not subject to the approval of Major League Baseball or its clubs.