Winckowski will be available out of the Red Sox bullpen beginning on Wednesday, Gabrielle Starr of the Boston Herald reports.
Winckowski was excellent in a long relief outing on June 25 and a start June 30, but he stumbled in a start versus the Yankees over the weekend, allowing three runs over just 3.2 innings. He'll now move to a relief role, which will open up a spot in the rotation on Friday against the Athletics.