With Sean Doolittle unavailable on Tuesday, Abad stepped in with one out in the eighth inning and retired Prince Fielder and Luis Sardinas in order.
"His stuff's good enough to get through some righties, too," manager Bob Melvin said. "It's kind of a luxury to have when Doolittle's down for a day, to be able to have an Abad that's going to pitch either the seventh or eighth inning for you."
Oakland acquired Abad in November in a low-profile swap with Washington for Minor League infielder John Wooten. Abad has shown great command of his heavy fastball while mixing it up with an effective curveball and changeup.
When asked if Abad would be considered for a potential save situation if the matchup is right, Melvin wouldn't directly address the southpaw, saying he will evaluate the closer situation on a game-by-game basis.
Alex Espinoza is a contributor to MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.