Eugene – Kayvonne Thibodeau left the Oregon season opener against Fresno State with a sprain in his left foot.

Rusher Edge Star at No. 11 in Oregon fell by about Obvious injury to the left foot/ankle during the first quarter after being hit from behind. Tepodox ran out of the field under his power and left the injury tent, a coach tied his foot and ankle and later returned to the game but left the sideline early before the break and did not return in the second half of the Ducks’ 31-24 win on Saturday afternoon at Utzen Stadium.

Oregon coach Mario Cristobal said Tibodo had been “twisted” but the X-rays were negative.

Thibodeaux had a couple of tackles including a sack, forced fumble and prepared teammate Braden Swenson for another sack during the first half.

One play after Tibodo’s injury, Oregon loses weak linebacker Drew Mattis to a left knee injury. Mattis, a senior, left the sideline on crutches.

Both players eventually returned to the Oregon touchline during the second half in streetwear, Thibodeau in walking shoes and Mathis wearing a knee brace and on crutches.

Oregon rallied to win 31-24 and play fourth in Ohio State next week.

Oregonian/OregonLive will update this story.