OU's process for investigation allegations of sexual misconduct involves a Title IX inquiry, followed by a hearing panel composed of faculty and staff and a final appeal to the chief student affairs offers.
The university found Shannon guilty of violating the school's sexual misconduct policy through all three of those steps and issued the one-year suspension June 18.
Cleveland County District Judge Tracy Schumacher issued a temporary emergency order June 25 continuing the proceeding until June 30, and then issued a summary order continuing the stay, allowing Shannon to continue his enrollment and participation in football workouts.
As a sophomore, Shannon was the Sooners' leading tackler last season with 92, including seven in the Sugar Bowl against Alabama.
He was expected to be one of nine returning starters on the defensive side for the Sooners.
After taking first-team reps early in camp, Shannon's role has slipped the last few weeks.
Instead, sophomore Jordan Evans topped the depth chart Monday at Shannon's normal inside linebacker spot, backed up by walk-on Caleb Gastelum.