Number (sports) - Wikipedia
Does this number make me look fat?
Evolution of the NFL Player
NFL jersey number rule change could bring back some classic college football looks for Derrick Henry, Jalen Ramsey and others - ESPN
NFL stars excited by zero jersey number rule change
NFL jersey number restrictions could change for running backs, receivers, tight ends, linebackers, defensive backs
NFL players can now wear No. 0 among rule changes
The NFL's new single-digit jerseys are inspiring excitement and a little grumbling - The Washington Post
NFL uniform rules and regulations are strict, in a good way - Sports Illustrated