The team released edge rushers Daniel Hardy and Keir Thomas and defensive tackle Marquise Copeland, each of whom looked as if he might be a contributor this season.
Also released was quarterback Brett Rypien, leaving Bennett as the lone reserve behind Stafford. Bennett, a fourth-round pick from Georgia, was wildly up and down in preseason games.
The Rams also said farewell to rookie Tanner Brown, leaving them without a placekicker.
Others released were tackle A.J. Acuri, defensive end T.J. Carter, defensive back Quindell Johnson, tight end Nikola Kalinic, center Mike McAllister, defensive back Cameron McCutcheon, guard Grant Miller, receiver Xavier Smith, receiver Austin Trammell, quarterback Dresser Winn, linebacker Jaiden Woodbey, running back Royce Freeman, linebacker DeAndre Square and defensive back Rashad Torrence.