Thibodeaux, who was knocked out of last Saturday’s win over Fresno State with a left ankle injury, was wearing sweats on the sideline during pregame warm-ups for the No. 12 Ducks.
Thibodeaux, an All-American last season, had a sack and a forced fumble in the first half against Fresno State. When he returned to the sideline for the second half, he was wearing street clothes and a walking boot.
ESPN NFL draft expert Mel Kiper Jr. listed Thibodeaux, a junior, as his No. 1 prospect, after he finished with 12 quarterback pressures last season.
Flowe, a freshman, had 14 tackles in last week’s victory.