1977 NFL season
|Duration||September 18, 1977 – December 18, 1977|
|Start date||December 24, 1977|
|AFC Champions||Denver Broncos|
|NFC Champions||Dallas Cowboys|
|Super Bowl XII|
|Date||January 15, 1978|
|Site||Louisiana Superdome, New Orleans, Louisiana|
|Date||January 23, 1978|
|Site||Tampa Stadium, Tampa, Florida|
Instead of a traditional Thanksgiving Day game hosted by the Dallas Cowboys, the league scheduled a Miami Dolphins at St. Louis Cardinals contest. This would be only the second season since 1966 that the Cowboys did not play on that holiday. It marked the last time that the Cowboys did not play on Thanksgiving.
This was the last NFL regular season with 14 games. The regular season was expanded to 16 games in 1978, with the preseason reduced from six games to four. It was also the final season of the eight-team playoff field in the NFL, before going to ten the following season.
The 1977 season is considered the last season of the “Dead Ball Era” of professional football (1970 to 1977). The 17.2 average points scored per team per game was the lowest since 1942. For 1978, the league made significant changes to allow greater offensive production.
- May 2, 1977: Earl Morrall, the oldest player on the 1972 Miami Dolphins championship roster announced his retirement from professional football. 
The 1977 NFL Draft was held from May 3 to 4, 1977 at New York City’s Roosevelt Hotel. With the first pick, the Tampa Bay Buccaneers selected running back Ricky Bell from the University of Southern California.
Tommy Bell retired after the 1976 season. His line judge, Jerry Markbreit, was named his successor. Bell worked two Super Bowls, III and VII. Markbreit would work four Super Bowls, and is (as of 2022) the only referee to achieve this.
Major rule changes
- The head slap is outlawed. This change is referred to as the "Deacon Jones Rule"; the Los Angeles Rams' defensive end frequently used this technique.
- Any shoe worn by a player with an artificial limb must have a kicking surface that conforms to that of a normal kicking shoe. Informally referred to as the "Tom Dempsey Rule." Dempsey was a record-breaking placekicker whose modified shoe (having a flattened and enlarged toe area) on his deformed kicking foot generated controversy during his career.
- Defenders are only permitted to make contact with receivers once.
- Defenders are not allowed to make contact with an opponent above the shoulders with the palms of their hands, except to ward him off the line.
- Offensive linemen are not allowed to thrust their hands to a defender’s neck, face, or head.
- Wide receivers are not allowed to clip defenders.
- This was the first season when the statistic for time of possession began to be recorded.
Tampa Bay and Seattle continued as "swing" teams that did not participate in regular conference play. Every other NFL team played a home-and-away series against the other members in its division, two or three interconference games, and the remainder of their 14-game schedule against other conference teams. Tampa Bay switched to the NFC and played the other 13 members of the conference, while Seattle did the same in the AFC. The teams met in Week Five, with Seattle winning 30–23.
Starting in 1970, and through 2001, except for the strike-shortened 1982 season, there were three divisions (Eastern, Central and Western) in each conference. This was the final season as 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
|1||3 teams||1–0||(Chicago, Green Bay)||1–0||Atlanta||1–0||3 teams||1–0|
|2||Dallas||2–0||4 teams||1–1||Atlanta*||1–1||8 teams||1–1|
|8||Dallas||8–0||Minnesota||5–3||Los Angeles||5–3||St. Louis*||5–3|
|9||Dallas||8–1||Minnesota||6–3||Los Angeles||6–3||St. Louis*||6–3|
|10||Dallas||8–2||Minnesota||6–4||Los Angeles||7–3||St. Louis||7–3|
|11||Dallas||9–2||Minnesota||7–4||Los Angeles||8–3||St. Louis||7–4|
|12||Dallas||10–2||Minnesota||8–4||Los Angeles||8–4||St. Louis*||7–5|
* other teams with same W-L record
American Football Conference
|1||(Baltimore, Miami)||1–0||3 teams||1–0||(Denver, Oakland)||1–0||5 teams||1–0|
|2||(Baltimore, Miami)||2–0||(Cleveland, Houston)||2–0||(Denver, Oakland)||2–0||3 teams||2–0–0|
|3||(Baltimore, Miami)||3–0||Cleveland*||2–1||(Denver, Oakland)||3–0||2 teams||3–0|
|4||Baltimore||4–0||Houston||3–1||(Denver, Oakland)||4–0||2 teams||4–0|
* other teams with same W-L record
Highlights of the 1977 season included:
- Thanksgiving: Two games were played on Thursday, November 24, featuring Chicago at Detroit. Chicago would prevail in a 31-14 final. The Miami Dolphins visited St. Louis to play the Cardinals, defeating them by a 55-14 mark. Dolphins quarterback Bob Griese would throw for six touchdown passes versus the Cardinals. The Dolphins would set a franchise record for most points scored in one game with 55.  Of note, the Dolphins would score eight touchdowns and accumulate 34 first downs.
- Baltimore finished ahead of Miami in the AFC East based on better conference record (9–3 to Dolphins’ 8–4).
- N.Y. Jets finished ahead of Buffalo in the AFC East based on better point-differential in head-to-head competition (1 point).
- Houston finished ahead of Cincinnati in the AFC Central based on better point-differential in head-to-head competition (2 points).
- Minnesota finished ahead of Chicago in the NFC Central based on better point-differential in head-to-head competition (3 points).
- Chicago won the NFC Wild Card over Washington based on better net points in conference games (48 to Redskins’ 4).
- Philadelphia finished ahead of N.Y. Giants in the NFC East based on head-to-head sweep (2–0).
|Dec 26 – Los Angeles Memorial Coliseum|
|Jan 1 – Texas Stadium|
|Dec 26 – Texas Stadium|
|Jan 15 – Louisiana Superdome|
|Dec 24 – Memorial Stadium|
|Super Bowl XII|
|Jan 1 – Mile High Stadium|
|Dec 24 – Mile High Stadium|
* The Denver Broncos (the AFC 1 seed) did not play the Oakland Raiders (the 4 seed) in the Divisional playoff round because both teams were in the same division.
- Atlanta Falcons: Leeman Bennett was named permanent head coach. Marion Campbell was fired after a 1-4 start to the 1976 season. General manager Pat Peppler served as interim for the rest of that season.
- Buffalo Bills: Jim Ringo was named permanent head coach. He was named interim head coach when Lou Saban resigned after the fifth game of the 1976 season.
- Denver Broncos: John Ralston was replaced by Red Miller.
- Detroit Lions: Tommy Hudspeth began his first full season as head coach. He replaced Rick Forzano, who left after the team lost three of its first four games in 1976.
- New York Giants: John McVay began his first season as head coach. He replaced Bill Arnsparger, who was fired after the team lost its first seven games in 1976.
- New York Jets: Walt Michaels became the Jets' new head coach. Lou Holtz resigned prior to the last game of the 1976 season, and Mike Holovak served as interim for the team's final game.
- San Francisco 49ers: Ken Meyer replaced the fired Monte Clark.
- Cleveland Browns: Forrest Gregg was fired before the last game of the season. Defensive coordinator Dick Modzelewski served as interim during the team's final game.
- Kansas City Chiefs: After an 0–5 start, Paul Wiggin was fired. Defensive backs coach Tom Bettis was named interim.
- The Tampa Bay Buccaneers changed the color scheme of the numbers on their white jerseys. In 1976, the numbers were orange with red trim; in 1977, they became red with orange trim to increase visibility.
- NFL Record and Fact Book (ISBN 1-932994-36-X)
- NFL History 1971–1980 (Last accessed December 4, 2005)
- Total Football: The Official Encyclopedia of the National Football League (ISBN 0-06-270174-6)
- Pro-Football-Reference.com: NFL Season By Season Scoring Summary
- 100 Things Dolphins Fans Should Know and Do Before They Die, Armando Salguero, Triumph Books, Chicago, 2020, ISBN 978-1-62937-722-3, p.49
- "NFL restricts line blocks, outlaws defensive head slap". Chicago Tribune. wire services. June 16, 1977. p. 3, sec. 4.
- 100 Things Dolphins Fans Should Know and Do Before They Die, Armando Salguero, Triumph Books, Chicago, 2020, ISBN 978-1-62937-722-3, p.44
- 100 Things Dolphins Fans Should Know and Do Before They Die, Armando Salguero, Triumph Books, Chicago, 2020, ISBN 978-1-62937-722-3, p.176
- 1977 Regular season Standings (Last accessed April 24, 2014)