Kansas City Chiefs: 2015
No fan base wonders what could have been more than the Kansas City Chiefs, who had some of the best years in franchise history spoiled by the Peyton Manning era in Denver.
If you sat down at a table with an NFL team before the season and could negotiate the outcome of their year, offering a win in the first game and an 11-game winning streak in the season, you would take that deal anytime.
The Chiefs started off the season with a win, but lost five straight games after that. Then they refocused and found a way to string together 10 straight wins to end the regular season and even got a postseason victory in the Wild Card round after narrowly missing out on the AFC West title.
Then the Patriots happened, and despite the greatness of Kansas City’s regular season, they couldn’t find a way to win the division and it ended up hurting them when they had to travel to New England.
The Denver Broncos won the Super Bowl this season, making matters even worse for Kansas City, but this was an incredible regular season run for them to finish 11-5 after starting 1-5.