The following Cubs have used up their last minor league option year in 2019 and thus will be out of options come Spring Training 2020 (presuming they are still on the Cubs 40-man roster):
Carl Edwards Jr
Alec Mills
Randy Rosario
Duane Underwood Jr
Mark Zagunis
Mike Montgomery and Allen Webster (as well as Article XIX-A players Brad Brach, Xavier Cedeno, and Tyler Chatwood) were already out of minor league options coming into the 2019 season, and although he is not yet on the Cubs 40-man roster, Danny Hultzen is also out of minor league options (which matters only if he were to be added to the Cubs 40-man roster at some point in the future).