When FRONTLINE started investigating the NFL’s concussion crisis in 2012, we ran into an early stumbling block. We wanted to know how many head injuries were taking place in the league each season. The trouble was, no major news organization was keeping count. With little to go off besides the NFL’s own numbers, we decided to try it ourselves.
For the past two seasons, FRONTLINE’s Concussion Watch project has been tracking which players have gone down with head injuries, and how long they sit out post-concussion. Over that time, more than 300 players have been added to the league’s official injury report because of a concussion. With Super Bowl XLVIII now over, here are five takeaways from the data: