Winn was recalled from Triple-A Sacramento on Sunday, Susan Slusser of the San Francisco Chronicle reports.
The 25-year-old was demoted to Sacramento on Wednesday but will quickly rejoin the major-league club with Alex Cobb (oblique) landing on the injured list. Winn made his big-league debut June 13 in St. Louis and earned a save after he allowed one run across four frames in a blowout victory.