The NFL is investigating whether correct concussion protocol was followed for Rams quarterback Case Keenum late in Sunday's loss at Baltimore.
A league spokesman says Monday that a review was begun after the game "to determine the facts of the injury ... and why (Keenum) was not removed from the game for the necessary evaluation by a team physician or the unaffiliated neuro-trauma consultant, as required by our concussion protocols."
That review is continuing Monday through discussions with the Rams and their medical staff, the ATC spotter, game officials, NFL medical advisers, and the players' union.
Meanwhile, the NFL plans to reinforce the procedures for this week, with three games scheduled for Thanksgiving Day.
The back of Keenum's helmet slammed into the ground. His hands immediately went toward his head, and he struggled to get up, appearing staggered. But he stayed in the game.