NFL teams that experience a COVID-19 outbreak among nonvaccinated players could forfeit regular-season games, with players on both teams not getting paid.

NFL Commissioner Roger Goodell warned the 32 teams Thursday in a memo obtained by The Associated Press that no games would be rescheduled under such circumstances. Instead, forfeits could happen.

“As we learned last year, we can play a full season if we maintain a firm commitment to adhering to our health and safety protocols and to making needed adjustments in response to changing conditions,” Goodell said.

He added that the league does not anticipate adding a 19th week to accommodate games.