NFL rule changes: Modified instant replay, more positions allowed to wear single-digit jerseys - The Washington Post
H-backs, tight ends expand their numbers – Football Zebras
NFL Passes Multiple Rule Changes, Including Relaxing of Jersey Number Restrictions - Sports Illustrated Minnesota Vikings News, Analysis and More
NFL replay rules could reportedly change dramatically in 2021
NFL approves jersey number expansion, other 2021 rule changes
NFL owners approve rule changes, including no preseason overtime and expanded jersey number options, NFL News
NFL Jersey Numbers NFL Football Operations
NFL Owners Approve Proposal To Allow Players To Wear No. 0 – SportsLogos.Net News
NFL rule change: What is NFL jersey number expansion?
New NFL jersey numbers, explained: What to know about league's rule change for 2021
Jacksonville Jaguars - Wikipedia