Several NFL Teams Propose Rule Changes To Add More Instant Replay
Report: NFL Is Considering Significant Rule Change
Replay Assistance Rule NFL Football Operations
NFL's instant replay officials have new powers, but owners weren't interested in other major rules changes - The Boston Globe
2021 N.F.L. Rule Changes: A Viewer's Guide - The New York Times
NFL replay reviews, challenges drop with new rules and tech - ESPN
How NFL rule changes for 2021 will impact the game - Fewer low blocks, expanded review and balanced holding calls - ESPN
2021 NFL rule changes guide - What to expect from more replay help, jersey number flexibility, more - ESPN
NFL's instant replay officials have new powers, but owners weren't interested in other major rules changes - The Boston Globe
Hurley: NFL Trying To Fix Instant Replay Problem By Not Addressing That Problem At All - CBS Boston