Hunter and Matusz each wound up working one-third of an inning in the eighth and kept the Orioles' deficit at 1-0 on Saturday.
Despite Hunter's rocky times lately, Showalter made it clear on Sunday that he remains an integral part of the Orioles' bullpen.
"We don't have any misgivings about bringing Tommy in," Showalter said. "He'll be in a situation again that's very meaningful for us."
Robert Falkoff is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.