One NFL player has died on the field. His widow watched Damar Hamlin's collapse in horror.
NFL player Damar Hamlin in recovery three days after on-field collapse - World Socialist Web Site
Remembering Jerry Green - by Steve Kornacki
chuck hughes Archives - Vintage Detroit Collection
Has anyone ever died from an NFL injury?
40 years ago Lions receiver Chuck Hughes died on Tiger Stadium gridiron - Vintage Detroit Collection
The Gridiron Uniform Database
TIGER Stadium Bleacher Creatures
Ford Field, Detroit Lions football stadium - Stadiums of Pro Football
TIGER Stadium Bleacher Creatures