"He hasn't pitched in a game since Sept. 5," said manager Bobby Valentine. "He's been throwing bullpen [sessions], so he threw today to some hitters, three innings. Felt good. Looked good. Looked really good."
There was nothing good about the first time Stewart pitched for the Red Sox. That game took place in Anaheim on Aug. 29, and the righty produced one of the worst debuts in team history, giving up 10 hits and nine runs over three-plus innings.
Stewart was the prospect the Red Sox got from the White Sox in return for Kevin Youkilis back in June.
He will have a chance to redeem himself in Baltimore.
"Oh, absolutely," said Valentine. "I didn't want that to be his only taste of pitching for the Red Sox."