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.