Rams' Avery out with soreness in foot

The St. Louis Rams expect to be without starting receiver Donnie Avery for four to six weeks after the second-year pro suffered a foot injury, coach Steve Spagnuolo told reporters Sunday.

An MRI showed more significant damage than expected after Avery experienced soreness in his left foot Saturday morning, the St. Louis Post-Dispatch reported.

The Rams lack established depth at wide receiver. Keenan Burton, Ronald Curry and Laurent Robinson appear to be the top three options beyond Avery.

Avery, a second-round choice in 2008 and the first receiver taken in his draft class, caught 53 passes for 674 yards and three touchdowns last season.

Mike Sando covers the NFC West for ESPN.com.