Loosened jersey number restrictions and no overtime in preseason highlight NFL rule changes
NFL considering loosening jersey number rules - Field Gulls
NFL passes rule change to expand jersey numbers for certain positions
NFL jersey number rules, explained: Why these players changed numbers for 2021 season
NFL likely to pass rule allowing more single-digit jersey numbers
Patriots' Jack Jones seems excited about NFL allowing players to wear jersey number zero - CBS Boston
Increased video review, expanded jersey numbers among NFL rule changes approved - The Athletic
NFL jersey numbers: Owners approve rule change on single digits
Several players change their jersey numbers after new rule passes – Quirky Research
New jersey numbers for players and other rule changes for 2021 - Hogs Haven