The Red Sox optioned Shugart to Triple-A Worcester on Sunday, Pete Abraham of The Boston Globe reports.
Shugart was recalled by the Red Sox on Sept. 1, and in his last outing Saturday against the White Sox, he gave up a three-run home run to Andrew Benintendi in the top of the seventh inning. In Triple-A this season, Shugart has a 4.55 ERA and 1.35 WHIP across 65.1 innings. The move makes room for right-hander Richard Fitts, who will start Sunday in his major-league debut against the White Sox.