McCormick dressed and participated in warmups before the Ducks' games against Nevada and last week against Montana but did not play. He was hampered by the injury throughout preseason camp.
"We have tried. Cam's got a tremendous heart, he's a hard worker," Ducks coach Mario Cristobal said at Monday's media availability. "I know he's been through a lot and he's been pushing trying to get there, but due to the nature of the injury he's going to be fine. But it is best -- in his best interest, in the best interest of the team -- that he have this year to heal up and then come back and join us next season and in spring ball with the offseason workouts."
It is the second straight season McCormick has been sidelined by injury. He sat out last year after breaking his leg in the season opener against Bowling Green.
A native of Bend, Oregon, McCormick redshirted his freshman year. He appeared in 13 games in 2017, with six catches for 89 yards and a touchdown.