History of the Green Bay Packers XIII and XIV following the 1978 and 1979 seasons and remain, to date, the only team to win back-to-back Super Bowl titles more than once, the San Francisco 49ers won Super Bowls XXIII and XXIV following the 1988 and 1989 seasons, the Dallas Cowboys won Super Bowls XXVII and XXVIII following the 1992 and 1993 seasons, the Denver Broncos won Super Bowls XXXII and XXXIII following the 1997 and 1998 seasons, and most recently, the New England Patriots won Super Bowls XXXVIII and XXXIX following the 2003 and 2004 seasons. After the franchise's victory in Super Bowl II, Vince Lombardi
Football Outsiders the sum of the squares of team points scored and allowed. The 2011 edition of "Football Outsiders Almanac" states, "From 1988 through 2004, 11 of 16 Super Bowls were won by the team that led the NFL in Pythagorean wins, while only seven were won by the team with the most actual victories. Super Bowl champions that led the league in Pythagorean wins but not actual wins include the 2004 Patriots, 2000 Ravens, 1999 Rams and 1997 Broncos." Although Football Outsiders Almanac acknowledges that the formula had been less-successful in picking Super Bowl participants from 2005-2008, it reasserted itself in