Wilks, who hasn't worked in college football in 15 years, will replace Ryan Walters as Missouri's defensive coordinator.
Brick Haley, Missouri's defensive line coach, spent four seasons in Columbia prior to today's reports.
Missouri added Isaac Zatechka, an offensive lineman who earned All-Nebraska honors in his senior season.
Former Rice linebacker Blaze Alldredge committed to Missouri as a graduate transfer Monday.
Cjay Boone played in just one game in his time at Missouri.
Garrett was released from the Minnesota Vikings practice squad earlier this year.Â
Defensive coordinator will join Bret Bielema's Big Ten staff in the same capacity.Â
Missouri cornerback announced Wednesday that he entered the transfer portal.
Cooper will have four years of eligibility remaining after spending one season at Ohio State.Â
Missouri's defense struggled mightily during its last three games of the 2020 season by giving up 148 points.