N.F.L.'s Concussion Protocol Under Scrutiny After Tagovailoa Injuries - The New York Times
Under the blue tent: How the NFL's concussion protocol went from a 'joke' to the gold standard
How the NFL's concussion-spotting system is working, and isn't
NFL players and owners are at odds over surfaces their teams play on
NFL Concussions Fast Facts
NFL players and owners are at odds over surfaces their teams play on
NFL: Concussions dropped by more than 50% among players who wore Guardian Caps during summer
Former NFL player accused of killing six people was suffering from severe CTE, Concussion in sport
Here is a timeline of the developing issue of concussions and how many players died from these brain injuries.
Browns' Duke Johnson has concussion; Ray Rice on radar?