The knee injury Glenn Foster suffered Sunday afternoon will end his season.
The New Orleans Saints defensive lineman was placed on injured reserve Monday after being knocked out of the 24-23 loss to the Detroit Lions.
The team also waived linebacker Todd Davis and re-signed tight end Tom Crabtree. Davis was promoted from the practice squad and Crabtree was released ahead of Sunday's game.
Foster, who was signed out of Illinois as an undrafted free agent last season, logged 71 snaps and recorded one tackle this season.
New Orleans now has an open roster spot.