NFL players opting out: Who will skip the 2020 season? - Sports Illustrated
The NFL's Opt-Out Policy: How it Works and Who is Not Playing in 2020
Players opting out of 2020 NFL season because of coronavirus concerns - Tracking the full list - ESPN
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University of North Texas
NFL opt out tracker: Which Cowboys, opponents' players will skip this season ?
Opt-outs reach 67 players as Thursday deadline passes
The NFL's Opt-Out Policy: How it Works and Who is Not Playing in 2020
UNT Looks to Bounce Back vs. Charlotte - University of North Texas Athletics
NFL Players who are opting out in 2020 - Behind the Steel Curtain
Players opting out of 2020 NFL season because of coronavirus concerns - Tracking the full list - ESPN