7 Sports has learned that Bills cornerback Terrence McGee will miss this Sunday's game at Arizona with a sprained left MCL suffered in the first quarter of Sunday's 31-14 win in St. Louis.

A source close to McGee tells 7 Sports reporter Shawn Stepner an MRI on Monday confirmed the injury that will keep McGee on the sidelines for this weekends game against the Cardinals. McGee is aiming to return to the lineup October 19th, when the Bills follow their bye week by hosting the Chargers.

Also, ESPN.COM is reporting that the Bills are switching fullbacks, releasing Darian Barnes and signing Corey McIntyre. There is no official announcement from the team. Barnes missed the Rams game Sunday with a foot injury.