Posted by ESPN.com's Mike Sando
Carter has struggled. The Rams expect recently acquired receiver Brandon Gibson to give them more. Carter was a stopgap signing.
Cornerback Danny Gorrer, signed from the Saints' practice squad, fills Carter's spot on the Rams' 53-man roster. He is an undrafted rookie.
The Cardinals, meanwhile, placed practice-squad defensive tackle Keilen Dykes on injured reserve. They signed former Vikings defensive tackle Antoine Holmes to fill Dykes' spot on the practice squad.