Hart was optioned to Triple-A Norfolk on Wednesday.
This comes as a bit of a surprise, as Hart was one of the better options in the Orioles' relief corps prior to serving up three runs in their 13-inning loss to the Tigers on Tuesday night. Apparently this debacle turned out to be Hart's demise, as he was sent back to the minors in favor of fresh arms. Miguel Castro will pop up from Double-A Bowie to take his roster spot, although Hart's prior performance should help him climb back up to the big leagues relatively soon.