Rodon was scratched from his scheduled start Thursday with left shoulder stiffness, Colleen Kane of the Chicago Tribune reports.
The announcement was made just 15 minutes prior to first pitch, with Mike Pelfrey tabbed as Rodon's replacement. This is certainly a troubling development, as Rodon missed the first three months of the season with left shoulder bursitis, but at this point it's uncertain if he will miss additional time.