Source: MRI shows Stanton has knee sprain

[ESPN]

The Arizona Cardinals appear to have dodged a bullet as an MRI has revealed QB Drew Stanton has a sprained right knee and is considered week to week, a source told ESPN NFL Insider Adam Schefter.

http://espn.go.com/nfl/story/_/id/12019879/arizona-cardinals-qb-drew-stanton-week-week-sprained-knee