what are the NFL's overtime rules describing the subtleties for both regular and postseason play both sides have run out of timeouts the score is deadlocked and the last seconds of the fourth quarter are running off what happens now apart from witnessing some free football both teams still have Victory under their hands still the guidelines for this additional play vary somewhat based on whether the game takes place during the 18we regular season or the postseason from a rule standpoint though how will the OT develop the athletic covers you completely with a detailed breakdown what are OT guidelines for the regular season should a regular season game finish with a tied score the captains for both teams and a referee will toss coins the visiting team captain calls heads or tails the toss winner indicates whether his team would want control of the ball first or on which side of the field they want