P.J. Locke Enters Concussion Protocol Following Loss to Cardinals

Dallas Cowboys safety P.J. Locke has entered concussion protocol following Sunday's overtime loss to the Arizona Cardinals. Locke had just returned from injured reserve, where he spent five games recovering from a foot injury before resuming practice on Oct. 23. His setback leaves Dallas' secondary further depleted alongside fellow rookie safety Caleb Downs, who also entered concussion protocol after Sunday's contest.