BALTIMORE -- Right-hander Chris Tillman will start Game 2 of Friday's doubleheader against the Rays after Bud Norris, who exited his last start with right groin tightness, was a little tentative in Wednesday's bullpen session.
Norris could potentially start later in the week, although manager Buck Showalter wouldn't commit to an exact date. Kevin Gausman will be added to the roster to pitch the first game, with Tillman going second on regular rest. With Thursday's off-day, the Orioles don't need another starter until July 1.
"Probably need to do [a bullpen] one more time and see if some of the tentativeness goes away," Showalter said of the plan for Norris, who exited Saturday's game after five innings. "It's more from the stretch than it was from the windup. But Tillman was good.
"We'll see what post-Friday brings. He may come in here on Friday and want to throw and feel good and Saturday or Sunday is an option."
Norri, who will have an MRI on his groin, has allowed just two earned runs over his last three starts, a 19 2/3-innings stretch, and if he can't go this weekend, the O's will use Wei-Yin Chen followed by Miguel Gonzalez.
Brittany Ghiroli is a reporter for MLB.com. Read her blog, Britt's Bird Watch, and follow her on Facebook and Twitter @britt_ghiroli. This story was not subject to the approval of Major League Baseball or its clubs.