Notable NFL players choose to opt out of the 2020 season due to COVID-19 - Acme Packing Company
How COVID-19 vaccine hesitancy among players is affecting NFL teams - Sports Illustrated
NFL decides on deadline for players to opt out of the 2020 season, per report
Don't hold your breath: COVID-19 is going to wreck the 2020 NFL season - The Boston Globe
A complete list of NFL players who have opted out for the 2020 season - Behind the Steel Curtain
Where are they now? Updating the status of NFL's biggest 2020 COVID opt-outs entering 2021 season
Can the NFL really have a season?
Complication due to COVID-19 ends Tommy Sweeney's 2020 season
Rams' COVID-19 reserve list grows to 16 players – Orange County Register