Pro football's troubled history of on-field medical emergencies
Floyd Little, Star Running Back for Syracuse and Broncos, Dies at 78 - The New York Times
American football - Wikipedia
15 Football (Soccer) Players Who Died On The Field - Discover Walks Blog
Five football players who died after collapsing on the field - EastMojo
Utah football player Aaron Lowe killed in shooting less than a year after teammate Ty Jordan - CBS News
Boys in Blue Showtime: Director Peter Berg on documentary, QB's death - Sports Illustrated
Exactly How Dangerous Is Football?
Was Natural Causes the Reason Behind Franco Harris Passing?
Gridiron Legacy: Pro Football's Missing Origin Story: Ficery, Gregg, Harris, Franco: 9781611883701: : Books
Junction Boys syndrome': how college football fatalities became normalized, College football