The non-roster invitee now has to be considered a serious candidate for the fifth spot in the rotation.
"I really try not to pay attention to all that stuff," Buchanan said. "All those decisions are made above my head. So I just try to go out there every time and throw strikes and battle and give the team a chance to win. Make a good impression and whatever happens, happens."
• Friday's game was designated as a test for baseball's expanded replay system but neither manager, Sandberg nor the Orioles' Buck Showalter, challenged a call.
Paul Hagen is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.