Is there a rule in the NFL that prevents a player from having a three digit jersey number? - Quora
NFL Approves Proposal To Reduce Restrictions On Jersey Numbers – SportsLogos.Net News
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
NFL jersey number restrictions could change for running backs, receivers, tight ends, linebackers, defensive backs
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
NFL players can now wear No. 0 among rule changes
NFL loosens their jersey number restrictions - Bleeding Green Nation
16 NFL players who could get new jersey numbers after rule change
Chiefs' jersey-number rule change passes NFL ownership vote - Arrowhead Pride