1972 Miami Dolphins

Regular season: 14-0
Playoffs: 20-14 over Cleveland; 21-17 over Pittsburgh; 14-7 over Washington
Avg. score: 27.5-12.2
Hall of Famers: Nick Buoniconti, Larry Csonka, Bob Griese, Jim Langer, Larry Little, Don Shula, Paul Warfield
Notable: Say what you want about numbers, competition, etc. but this is only team to go unbeaten in regular season and playoffs.