Fitts is slated to start Wednesday's game against the Blue Jays in Toronto.
After making a spot start Sept. 13 while Tanner Houck dealt with shoulder fatigue, Fitts ended up sticking in the rotation for another turn this past Friday versus the Twins. Fitts was denied a win, but he tossed five scoreless innings in the contest and now appears to have solidified a spot as the Red Sox's No. 5 starter over Cooper Criswell, who was optioned to Triple-A Worcester on Saturday. Fitts' upcoming start Wednesday will likely mark his final outing of the season, and he'll look to end the campaign on a high note as he aims to stake a claim to a rotation spot heading into 2025.