26. Broncos vs. Raiders (1977)
The Raiders blame this defeat on a missed call but that’s not the full story. Oakland played the Broncos at Mile High Stadium in the AFC Championship Game. This was their fifth consecutive title game appearance but Denver was better all season. It was a close game until a turning point in the third quarter. Jack Tatum recovered a Broncos’ fumble but the official didn’t spot it.

Older fans will never forget this moment because it was a terrible mistake. The official claimed that nothing untoward happened despite the Raiders’ protests. Then, to rub salt into their wounds, Denver scored a touchdown on the next play. Oakland capitulated and was unable to come back into the game (via Bleacher Report).