NFL Jersey Numbers NFL Football Operations
NFL owners pass rule expanding eligible jersey numbers for certain
NFL players can now wear No. 0 among rule changes
NFL jersey number rules, explained: Why these players changed
NFL Relaxes Restrictions on Jersey Numbers - The New York Times
Why NFL players were drawn to jersey No. 0 after its return - ESPN
NFL jersey number restrictions could change for running backs
NFL approves rule change on jersey number, nixes overtime shifts
NFL jersey number restrictions could change for running backs
NFL jersey number restrictions could change for running backs