Posted by ESPN.com's Mike Sando
Avery reported soreness in his foot Saturday, but never did the Rams expect to find an injury this significant. Avery apparently suffered it during the team's scrimmage Friday night.
The Rams have conducted a very physical camp, but none of their injuries appear related to live tackling. This is a very tough break for a rebuilding team without enough depth to compensate for injuries to certain positions, notably receiver.
With Avery out, the Rams might need to consider adding another veteran. Keenan Burton, Laurent Robinson, Ronald Curry, Tim Carter, Derek Stanley, Brooks Foster, Jarrett Byers and Sean Walker are the other receivers on the roster.
According to the Rams, the MRI showed more damage than the initial X-ray revealed.
Update: With the regular-season opener five weeks out, Avery has a chance to return in Week 1 or Week 2.