I have done a statistical analysis of all the current NFL franchises to determine which is the most successful of all time and which is the most successful of the SuperBowl era (including 2005). Let me lay the groundwork first: This analysis was to determine which franchises have been the most successful over the years that they have been in the league and then to determine which has been the most successful in the SB era. It is based on the number of years, winning %, playoff appearances, playoff win %, and championships with different weighting for each. ============================================ For the all-time analysis I started in 1933, the year of the first NFL Championship Game. Prior to that year, the team with the best record was declared the Champion. Also, teams prior to 1933 played different schedules, one team might play 16 games while another might have only played 6. In 1933 the league standardized the schedules so that each team would play the same number of games (although there were a few exceptions). Team records and titles prior to 1933 are therefore discarded for the purposes of this analysis. The final rating for the All-Time analysis is not as complex, and therefore not as fair, as it is for the SuperBowl era analysis. The reason for this is the weight given in the SB era to Division Titles, Conference Titles, and SB Appearances which could not be applied evenly or fairly across the years prior to 1966 since there were usually only 2 divisions and the only playoff game was the Championship game. Here are the Top-10 Most Successful Teams of All-Time with the number of Championships: 1. Packers-10 2. Browns-8 3. Cowboys-5 4. Bears-7 5. Giants-5 6. Steelers-5 7. 49ERs-5 8. Redskins-5 9. Rams-3 10. Raiders-3 Each of these teams has won at least 3 championships and have appeared in the playoffs 20+ seasons. The Cowboys and Giants are tied for the lead with 27 playoff appearances but since the Giants have been around the entire 73-year period (since 1933) and Dallas has only been in the league since 1960 we have a much higher percentage of playoff appearances than NY. The Raiders are the only other team to begin in 1960 or later to make the top-10 although the Dolphins barely missed out at #11. The Bottom-10: 32. Texans 31. Saints 30. Cardinals 29. Panthers 28. Bengals 27. Jaguars 26. Falcons 25. Seahawks 24. Bucs 23. Ravens You will notice that all of the bottom-10 teams are among the most recent expansion teams except the Cardinals who are actually the NFL's oldest team. The Falcons, Bengals, and Saints all came in during the late 60s, the Bucs and Seahawks entered in 1976, and the rest from 1995-on. I might think that my weighting was off but the Dolphins came in at #11 and they joined the same year as the Falcons so that blows that deal. Miami also has the highest winning % of all-time at 59.9% Of the Bottom-10 teams, only the Jags have a winning record in the regular season while the Texans, Bucs, Cardinals, Saints, Falcons, and Bengals are under 45% so these truly are the bottom of the barrel. ======================================== Now on to the SuperBowl Era: This analysis begins in 1966, the year of SuperBowl-I and takes into account Regular Season Win %, Playoff Appearances, Playoff Wins, Playoff Win %, Division Titles, Conference Championship Appearances, SB Appearances, and SB Wins all factored into the number of years the team has played in that era. The Top-10 Most Successful Teams of the SuperBowl Era are: 1. Cowboys 2. Steelers 3. 49ERs 4. Raiders 5. Dolphins 6. Broncos 7. Redskins 8. Packers 9. Vikings 10. Rams The Dallas Cowboys rank #1 in: Regular Season Wins-367, Winning %-60.5, Playoff Appearances-27, Playoff Wins-32, Playoff Games-53, Division Titles-18, Conference Championship Game Appearances-16, SuperBowl Appearances-8, and tied with the Steelers and 49ERs with 5 SuperBowl Wins. They have far and away been the most successful franchise of the SuperBowl Era The Raiders are the only other team with a regular season win % of 60+ at 60.2% with the Dolphins coming in very close at 59.9%. All of the teams in the top-10 except the Packers have a win % over 56% with Green Bay coming in at 51.0%. The only anomaly in the Top-10 was the Vikings with zero SB wins but otherwise they have been a very successful franchise. In fact they are 2nd in number of playoff appearances with 23 but they lead in the number of playoff losses with 23. They are tied for 3rd in Division Titles-16 and have appeared in 4 SBs. The Bears have won the most games at 549 while the Cardinals have lost the most at 580. The Bottom-11: 32. Texans 31. Saints 30. Cardinals 29. Lions 28. Falcons 27. Jaguars 26. Seahawks 25. Chargers 24. Bengals 23. Panthers Once again, only the Jags have a winning % in the regular season. It may not seem fair to have the Texans at all since they are only 4 years old but their 22.9 winning % merits them last place regardless. The Panthers and Jags had both been in the playoffs by that time so the Texans get no slack from me. The Falcons have lost the most games in the SB Era with 352 losses. ================================================== Let me know if you have a question about a specific team or how the rankings were arrived at. Comments? Also, if someone can help me with the HTML I will paste the spreadsheet here so you can see the whole thing.