IOWA CITY, Iowa (AP) — Iowa senior defensive end Drew Ott has torn the ACL in his right knee and is done for the season.

Ferentz says tests confirmed Ott's injury on Monday.

Ott left last week's 29-20 win over Illinois in the third quarter. He came back out for the fourth quarter on crutches.

Ott is one of the best players for the 17th-ranked Hawkeyes (6-0, 2-0 Big Ten). He ranks sixth in the Big Ten with five sacks despite an arm injury earlier this season.

Freshman Parker Hesse will start in place of Ott on Saturday against No. 20 Northwestern.