The Cincinnati Bengals placed defensive tackle Geno Atkins on injured reserve Monday.
Atkins, in his fourth season, is out for the season with a torn ACL. He sustained the injury last Thursday against the Miami Dolphins.
He leads the team with 29 tackles and six sacks. He was a first-team selection on the Associated Press All-Pro team last season, leading all interior linemen with 12.5 sacks. He has played in the last two Pro Bowls.
The Bengals signed defensive tackle Christo Bilukidi to the roster to take Atkins' spot, but the contract was later voided because Bilukidi, who is from Canada, does not have the proper documentation to work in the United States at this time. Bilukidi, sixth-round draft choice by the Oakland Raiders in 2012, had 12 tackles in 13 games last season. He was waived by the Raiders on Oct. 23.