1. Injuries Decimated the Bills
Everyone saw this, but we'll say it out loud anyway. Injuries decimated the Bills at the worst time of year.
The AFC East champs ended the regular season on a five-game winning streak, carrying that momentum into a Wild Card showdown against the Pittsburgh Steelers. Slowly, key personnel fell off as the season progressed before the Bills were left with a shell of a roster.
Buffalo was without their instrumental wide receiver Gabe Davis against the Kansas City Chiefs, and they also missed Taylor Rapp, Christian Benford, and Baylon Spector on Sunday. That's without even considering the handful of players forced out of the Divisional Round with in-game injuries.
The Bills gave the Chiefs everything they could handle, but the outcome probably would have been different if Buffalo had a full roster.