The NFL had 37 positive COVID-19 tests on Monday, according to sources.

The high number of positive tests has the NFL and NFL Players Association considering further changes to the league's coronavirus protocols as the regular season enters its final four weeks.

The NFLPA has continued to push for daily testing for all players and personnel, regardless of vaccination status, as a means of identifying and tracking cases earlier and preventing spread in team facilities.

The league has resisted the union's calls for daily testing.