Orioles notes: O'Day, Gentry head to DL for potentially long stays; Yacabonis to start Thursday; Wynns sent down

The Orioles added infielder Steve Wilkerson and right-hander Jimmy Yacabonis and placed reliever Darren O'Day (hamstring) and spare outfielder Craig Gentry (fractured rib) on the disabled list Wednesday, absences manager Buck Showalter believes might not be short ones.

"Darren had the MRI on his hamstring," Showalter said. "There's three grades. I'm not sure — it wasn't the worst grade, but he's got a problem there and hopefully it'll manage. Can't put a timeframe on it, but it's pretty sore."

Regarding Gentry, who couldn't shake the soreness after being hit by a pitch Friday in Atlanta, neither he nor Showalter expect him to be able to return when he's eligible July 3.

"That's something that could potentially manage itself in a shorter period of time than you normally think about when something is cracked, I'm told, but we'll see what the next week brings," Showalter said. "I think we can gain some days on him, but I don't think he can make seven or eight days. We didn't want to take any chances with him."

Wilkerson, who debuted last week in Washington and was optioned back to the minors after playing one game this weekend in his hometown of Atlanta, returns to combine with Jace Peterson to fill a utility role that could allow him to line up anywhere on the diamond if need be.

Yacabonis was added as bullpen cover Wednesday, and because he wasn’t used, will start Thursday for his first major league start. After the game, the roster shuffle continued with Austin Wynns optioned to Triple-A Norfolk.

Wynns had started once in nine games since Caleb Joseph returned from Norfolk last Tuesday.

Harvey’s shoulder checked

Orioles top pitching prospect Hunter Harvey saw renowned orthopedic surgeon Dr. James Andrews on Wednesday to ensure his recovery from a shoulder injury was on track.

Showalter said the team "just want to make sure we're doing the right things and taking the right precautions" as Harvey works his way back, and that surgery wasn't on the table at this point.

Harvey suffered the injury in the dugout between starts with Double-A Bowie when, in an attempt to dodge a foul ball, he jumped down below the dugout railing and had his shirt sleeve catch on the rail, creating a structural issue in his shoulder.

Around the horn

Orioles third-round draft pick Blaine Knight pitched six innings of one-run ball for Arkansas on Tuesday night in the first game of the College World Series against Oregon State, likely finishing his junior season 14-0. ... Left-hander Keegan Akin, who is having a standout season for Double-A Bowie, left his start Tuesday with a groin injury, Showalter said.

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The Orioles' Adam Jones reacts after getting hit by a ground ball hit by Manny Machado in the fifth inning against the Angels, Saturday, June 30, 2018. Jones was called out on the play. (Gail Burton / AP)