Detroit Lions defensive tackle Corey Williams is on crutches but keeping positive after undergoing surgery on his right knee Tuesday, Anwar S. Richardson of MLive.com reported.

Famed orthopedic surgeon Dr. James Andrews performed the surgery. Williams will not play Sunday against the Minnesota Vikings and is listed as week-to-week. Lions coach Jim Schwartz has not given a timetable for Williams' return.

Sammie Hill and Nick Fairley are expected to fill in for Williams at defensive tackle. The 13th overall pick in the 2011 NFL Draft, Fairley had foot surgery prior to his rookie season and was never fully healthy in 2011, but he could start Sunday after having a strong offseason.

Williams is tied with Ndamukong Suh for the team lead with two sacks on the season, equaling his total from all of last year. He also forced a fumble in a Week 1 win over the St. Louis Rams. In 122 career games, Williams has recorded 273 tackles and 27.5 sacks.