New England Patriots wide receiver DeVante Parker suffered a concussion during Monday's win over the Arizona Cardinals, and the league and the NFLPA are investigating how the injury was handled.
Parker appeared to come up wobbly following a hit, as ESPN broadcaster Troy Aikman noticed.
The game only stopped because fellow Patriots wide receiver Nelson Agholor recognized something was wrong and waved his arms to catch the attention of others.
This article will be updated soon to provide more information and analysis.