The Rangers wanted to stay with an eight-man bullpen, including long reliever Phil Klein. The Rangers wanted the protection because Griffin is making his first start since Sept. 24, 2013. He missed the last two seasons because of Tommy John surgery.
Ruggiano was signed as a free agent in the offseason as a right-handed alternative to Josh Hamilton in left field. But Hamilton is on the disabled list and Ian Desmond is now the full-time left fielder.
The Rangers have 10 days to trade, release or put Ruggiano through outright waivers. He can refuse an outright assignment and take his free agency.
T.R. Sullivan is a reporter for MLB.com. Follow him on Twitter @Sullivan_Ranger and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.