Top 5 NFL teams that didn't win a Super Bowl

2. Buffalo Bills, 1990-91

Happy 61st Birthday to Jim Kelly!• Led Bills to 8 postseason appearances• 5× Pro Bowler• NFL passing TDs leader (1991)• NFL passer rtg leader (1990)• NFL comp % leader (1990)• Buffalo Bills No. 12 retired• Pro Football Hall of Fame@JimKelly1212 | #BillsMafia pic.twitter.com/GpHQj52RSa

— CBS Sports HQ (@CBSSportsHQ) February 14, 2021

Record: 13-3

The Buffalo Bills made the Super Bowl four times in four years and lost each time. But this 1990-91 defeat was probably the most heartbreaking of them all: the Bills came within inches of beating the Giants, losing in the final by a single point.

The Bills had an elite-level QB in Jim Kelley. The running game was strong, too, headed up by Thurman Thomas, who rushed for 1,297-yards and 11 TDs. The defense was great: it featured Defensive Player of the Year Bruce Smith. There certainly weren't many chinks in the Bills' armor back in 1990; this was a team that should have won a Super Bowl.

Unfortunately, this happened:

Scott Norwood missed his field goal attempt, and the Bills came as close as they ever have to a Super Bowl win.

Things are certainly looking up with Josh Allen and Stefon Diggs showcasing their talents at the newly-named Highfield Stadium though, huh Bills fans?

1) New England Patriots, 2007-08

New England Patriots v New York Giants

Record: 16-0

The 2007 New England Patriots went 16-0 and set an NFL record for most points scored in the history of the league.

Tom Brady threw for 4,870-yards and an incredible 50 TDs on the year, many of which were taken to the crib by receivers Randy Moss and Wes Welker. Randy Moss finished up the regular season with 1,493 receiving yards and 23 TDs, which is still an NFL record.

Nobody thought the Patriots could be beaten when they faced off against the Giants at the Super Bowl. Bill Belichick's men were heavy betting favorites.

Things didn't go as planned. The Giants' defense put pressure on Brady and upset the Pats' passing offense.

Eli Manning and co. had just enough on offense to eke out a famous 17-14 Super Bowl victory fothe Giants, but the 16-0 Patriots had to wait a decade before their next Super Bowl win.