Montgomery didn't factor in the decision Sunday against the Brewers after giving up three runs on six hits with six strikeouts and two walks over 4.1 innings.
The left-hander generated 13 swinging strikes but was unable to get through five frames on 91 pitches. It was the second straight start for Montgomery after making four appearances out of the bullpen, and he's combined to allowed six runs on 12 hits with a 10:4 K:BB across nine frames in his two turns through the rotation. The 31-year-old could shift back to the bullpen for the final few games of the regular season if Ryne Nelson (shoulder) is able to return from the injured list this weekend against the Padres.