Chris Davis' wife is about to deliver the couple's first child. The current plan is for the Orioles to put Davis on the paternity list for two days.
Tommy Hunter was placed on the 15-day disabled list with a strained left groin.
Wei-Yin Chen pitches for the Orioles as they begin a four-game series against Cleveland.
Chris Tillman was knocked out in the second inning, and the Orioles suffered a painful 9-8 loss to the Pittsburgh Pirates.
Young infielder Xander Bogaerts thought he was being groomed to stay at short, but now he goes to third base.