The NFL and NFL Players Association are currently in a dispute over the injury classification for players who test positive for COVID-19, according to ESPN's Dan Graziano.
The NFL is reportedly attempting to classify COVID-19 as a "non-football injury," per Graziano. Teams are currently not required to pay players who miss games due to non-football injuries. If a player were to contract COVID-19 during a practice or game, teams would have the right not to pay him if he is placed on the non-football injury list.
The NFL and NFLPA are working on a host of issues in addition to its dispute over the non-football injury list.