1972 NFL season

The 1972 NFL season was the 53rd regular season of the National Football League. The Miami Dolphins became the first NFL team to finish a championship season undefeated and untied when they beat the Washington Redskins in Super Bowl VII.

Major rule changes

 * The inbounds lines or hashmarks were moved closer to the center of the field, 23 yards, 1 foot, 9 inches from the sidelines. The hashmarks are now 18 feet, 6 inches apart (the same width as the goalposts), cutting down on severe angles for short field goal attempts.
 * If a legal receiver goes out of bounds, either accidentally or forced out, and returns to touch or catch the pass in bounds, the penalty is a loss of down (but no penalty yardage will be assessed).
 * If a punt or missed field goal crosses the receivers' goal line, a member of the receiving team may advance the ball into the field of play. Previously, the ball was dead when a scrimmage kick crossed the goal line and the receivers were awarded an automatic touchback.
 * All fouls committed by the offensive team behind the line of scrimmage will be assessed from the previous spot.
 * Tie games, previously ignored in computing of winning percentage, were made equal to a half-game win and a half-game loss.

Division races
Starting in 1970, and until 2002, there were three divisions (Eastern, Central and Western) in each conference. The winners of each division, and a fourth "wild card" team based on the best non-division winner, qualified for the playoffs. The tiebreaker rules were changed to start with head-to-head competition, followed by division records, common opponents records, and conference play.

National Football Conference

American Football Conference

Final standings
W = Wins, L = Losses, T = Ties, PCT= Winning Percentage, PF= Points For, PA = Points Against

 – clinched wild card berth, – clinched division title

Note: Prior to 1972, the NFL did not include tie games when calculating a team's winning percentage in the official standings

Playoffs

 * Note: Prior to the 1975 season, the home teams in the playoffs were decided based on a yearly rotation.