NFL Football Operations on X: .@NFL owners approved a rule change proposed by the @Chiefs expanding jersey number options for certain positions. Check out the full list of 2021 rule changes
NFL Throwback Uniforms: Ranking the 15 best vintage jerseys in league history
How do NFL players pick their jersey number? - Quora
New NFL jersey numbers, explained: What to know about league's rule change for 2021
Squad number (association football) - Wikipedia
NFL franchise tag: What you need to know – NBC Sports Philadelphia
NFL jersey number system needs to evolve with the game - Sports Illustrated
NFL Jersey Numbers NFL Football Operations
Authentic or knockoff — NFL jerseys - The Daily Universe
Tee Higgins' new jersey number, explained: Why Bengals WR switched from 85 to 5
Is there a rule in the NFL that prevents a player from having a three digit jersey number? - Quora
NFL jersey numbers: Here's a running list of players who have decided to make a switch beginning in 2021