Josh Allen has confidence in what the Buffalo Bills have built despite falling short of an AFC title game and Super Bowl appearance again Sunday night.

The Bills battled back from 6-6 to win the AFC East and put together a six-game winning streak, but they lost to the Kansas City Chiefs in the divisional round. 

Allen, 27, said he isn't worried about the championship window closing.

"I believe in what we've got going on here and the people that are in charge," he said. "I believe in myself. And that'll never change."

Despite the success Allen has had in 10 career postseason games -- 64.6% completions, 21 passing touchdowns, 4 interceptions, 83 rushing attempts for 563 yards and 5 rushing scores -- Buffalo is just 5-5 in those contests.