Matthew Stafford injury news: Rams QB in concussion protocol, doubtful - Turf Show Times
Rams QB Matthew Stafford Placed in Concussion Protocol - Sports Illustrated
Rams still evaluating Matthew Stafford; QB not in concussion protocol - ESPN
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Rams' Matthew Stafford in concussion protocol, uncertain vs. Cardinals - Los Angeles Times
Rams: Matthew Stafford not in concussion protocol right now, will have more tests - NBC Sports
Rams QB Matthew Stafford in concussion protocol, status vs. Cardinals in question