Sports-related curses
The Buffalo sports curse is an explanation for Buffalo's inability to win a Super Bowl, Stanley Cup, or an NBA championship. Those who believe in the Buffalo curse cite as examples the four consecutive Super Bowl losses by the Buffalo Bills for the 1990–1993 seasons (and the team's failure to qualify for the NFL playoffs from 2000 to 2017), as well as the failure of the Buffalo Sabres ever to win the Stanley Cup (despite winning the Presidents' Trophy for most regular-season points in 2006–07). The Bills, however, won two American Football League (AFL) titles (1964 and 1965), the latter occurring just months before an agreement was reached to merge the AFL and the National Football League (NFL) (Bills owner Ralph Wilson initiated the talks to merge the two leagues, according to the Pro Football Hall of Fame). In spite of that, it has been argued that this was achieved when the AFL was in its infancy as an upstart league, garnering little, if any, national attention before merging with the established NFL, and that even if they are considered to be at par, since there would be no Super Bowl until after the 1966 season, the Bills could be no greater than co-champions. There have been conflicting suggestions on how the Bills would have fared against the Green Bay Packers or Cleveland Browns, much as there have been disputes over how well the San Diego Chargers would have played against the Bears in 1963, had the Super Bowl existed at that time.
New England Patriots
The Patriots have appeared in the Super Bowl eleven times in franchise history, the most of any team, nine of them since the arrival of head coach Bill Belichick and quarterback Tom Brady in 2000. The Patriots have since become one of the most successful teams in NFL history, winning 16 AFC East titles in 18 seasons since 2001, without a losing season in that period. The franchise has since set numerous notable records, including most wins in a ten-year period (126, in 2003–2012), an undefeated 16-game regular season in 2007, the longest winning streak consisting of regular season and playoff games in NFL history (a 21-game streak from October 2003 to October 2004), and the most consecutive division titles won by a team in NFL history (won ten straight division titles from 2009 to 2018). The team owns the record for most Super Bowls reached (nine) and won (five) by a head coach–quarterback tandem, and most Super Bowl appearances overall (eleven). Currently, the team is tied with the 49ers and Cowboys for the second most Super Bowl wins with five, after the Steelers, who have six.