NFL jersey numbers: Here's a running list of players who have decided to make a switch beginning in 2021
NFL doesn't allow players to switch numbers during season - NBC Sports
Players Can Now Wear No. 0 as Part of NFL Rule Changes
How do NFL players pick their jersey number? - Quora
Uniform number (American football) - Wikipedia
2021 NFL rule changes: Expanded jersey numbers among 6 new rules
Single-Digit Jerseys Should Be the NFL's Most Exclusive Club - The Ringer
Cowboys reveal what number Jason Peters will wear with Dallas
Don't forget my number! NFL players can now wear No. 0 (well, not all of them) - Field Gulls