The NFL has been forced to move three games for Week 15 due to the COVID-19 outbreak across the league and the United States.

The Cleveland Browns, who could have been without as many as 20 players, were set to face the Las Vegas Raiders on Saturday, but that clash has been rescheduled for Monday.

The Washington Football Team were preparing to face the Philadelphia Eagles on Sunday, the same day in which the Seattle Seahawks and the Los Angeles Rams were due to do battle, but both games will now take place on Tuesday.

The NFL announced the changes in a statement, which said: "We have made these schedule changes based on medical advice and after discussion with the NFLPA as we are seeing a new, highly transmissible form of the virus this week resulting in a substantial increase in cases across the league.

"We continue to make decisions in consultation with medical experts to ensure the health and safety of the NFL community."

Due to the changes, all six sides involved will have shorter breaks between Week 15 and 16. The Browns head to the Green Bay Packers on Christmas, while the Raiders, Eagles, Washington, Seahawks and Rams all have two days fewer to prepare for their next games.

The fixture alterations come after the NFL announced updated coronavirus protocols on Thursday, which include fully vaccinated players being allowed to return from quarantine a day after testing positive if they produce two negative tests within 24 hours and are asymptomatic.

Indeed, 32 players were placed on the reserve/COVID-19 list on Friday alone, after reports on Wednesday suggested around 100 NFL players recently tested positive for the virus across a three-day span.

Last season amid the ongoing global pandemic the NFL completed its season on time but had to reschedule 18 games.

In July, NFL Commissioner Roger Goodell warned the 32 teams that no games would be rescheduled under such circumstances again and, instead, forfeits could happen.