The Rams have taken the lead over the Cardinals late in the second quarter and Arizona may not have one of its key offensive players for the rest of Saturday night.
The Lions are holding out hope that running back David Montgomery will be able to play again this season, but his return will not come against the 49ers on Monday night.
The NFL's much-discussed new rule against hip-drop tackles has only produced one penalty flag this season, against Carolina's Jacoby Windmon on Sunday — and the league's disciplinary office didn't agree with that call.