The NFL's concussion protocol was not violated when New England Patriots safety Patrick Chung returned to a Week 2 loss to the Jacksonville Jaguars, the league and its players association said Thursday.
Chung initially left the game after defending a running play with 12:54 remaining in the second quarter after charging toward the line of scrimmage during ball-carrier Corey Grant's 1-yard run. Chung was met in the hole by tight end Niles Paul, and after Paul landed on top of him, Chung briefly lay prone on the ground with his hands near the opening of his helmet as umpire Barry Anderson waved his arms to signal a stoppage in play.