Taysom Hill out for the season with torn ACL-additional damage per Rapoport [Hill placed on Injured Reserve on 12/6]

There was a Bills player that broke his neck on a kick off during a pre-season game about 10 years ago. They did a procedure on the field that was experimental at the time that saved his life.
Kevin Everett. If I remember correctly the league banned the wedge on kickoffs after his injury.

https://engineering.jhu.edu/magazine/2008/09/cool-thinking-saves-day/