The Orioles optioned Krehbiel to Triple-A Norfolk on Wednesday.
With Baltimore needing relievers to cover 12.2 innings over the first two games of its series in Boston, the club will bring aboard a pair of fresh arms for the bullpen in Keegan Akin and Beau Sulser while sending out Krehbiel and Jake Reed. Krehbiel was handed the loss Tuesday after failing to retire a batter while getting charged with two earned runs on two hits and two walks.