Fulmer, who was tapped to start Sunday's game against the Giants, is not necessarily in the rotation for the rest of the season, Colleen Kane of the Chicago Tribune reports.
Manager Rick Renteria said he could grant spot starts to left-hander David Holmberg and right-hander Dylan Covey this month, but with Carlos Rodon (shoulder) scratched from his most recent start, there will be no shortage of opportunities for Fulmer.