Woodruff was scratched from his scheduled start Tuesday against the Cardinals due to right hamstring tightness.
This is a tough break for Woodruff, who was in line to make his MLB debut after holding his own at hitter-friendly Colorado Springs. Not much else is known at this point given the vague diagnosis, but an update on his condition should become available in the near future. Southpaw Brent Suter will now start Game 1 of the doubleheader in his place.