The Red Sox optioned Winckowski to Triple-A Worcester on Monday, Jen McCaffrey of The Athletic reports.
Winckowski tossed a scoreless inning Monday versus the Blue Jays in the resumption of a game that was previously suspended June 26, but he'll be send down to the minors ahead of Monday's regularly scheduled contest. Justin Slaten (elbow) was reinstated from the injured list to take Winckowski's spot on the active roster.