Palmeiro is back but he isn't playing yet.

Also, it looks like Eric DuBose will be starting this weekend leaving John Maine in the minors:

Saturday starter: The Orioles have yet to announce a starting pitcher for Saturday's game against Toronto, but Perlozzo said it will be either Eric DuBose or Triple-A Ottawa's John Maine. Perlozzo indicated that unless DuBose is needed for a relief outing on Thursday or Friday, he would be the starter. DuBose, who was 8-10 with a 3.25 ERA for Double-A Bowie, was in the rotation last season before missing the final three months because of elbow surgery.