Let’s jump in with the rules, via the NFL’s Football Operations site: If the score is still tied at the end of an overtime period — or if the second team’s initial possession has not ended — the teams will play another overtime period. Play will continue regardless of how many overtime periods are needed for a winner to be determined.

When it comes to overtime, things can be kind of confusing in the NFL and that's because the league has a different set of rules for the playoffs that's not used in the regular season. The current overtime rules for the postseason were implemented in 2022 and they guaranteed that both teams would get at least one possession in overtime.