Winckowski was recalled from Triple-A Worcester to serve as the 27th man in Saturday's doubleheader against the Orioles.
After posting a 3.13 ERA and 0.87 WHIP in 31.2 innings over seven starts at Triple-A Worcester, Winckowski is expected to make his major-league debut as the starter in the second game of Saturday's twin bill. Although Saturday's outing will likely be a spot start, he could be in the mix for a more prominent role later in the year.