1999 Denver Broncos season

The 1999 Denver Broncos season was the team's 40th year in professional football and its 30th with the National Football League. After winning their second consecutive Super Bowl with a win over the Atlanta Falcons in Super Bowl XXXIII in Miami, the team suffered the retirement of Super Bowl XXXIII MVP quarterback John Elway during the off-season. Elway had spent his entire career with the Denver Broncos, and much of the focus in the weeks leading up to the season centered on the void left by Elway's departure. Head Coach Mike Shanahan announced that third-round 1998 draft pick Brian Griese, son of Miami Dolphins Quarterback Bob Griese, would take the reins of the offense, passing over veteran and credible back-up QB Bubby Brister.

Although no one expected a serious defense of their title, the Broncos would stumble out the gate this season, losing the first four regular season games. Many of the games would be decided in the final two minutes of play, but the Broncos found themselves on the losing end at 6–10. It was their first losing season since 1994, the worst season since 1990 and the worst record of the five-team AFC West. It was speculated by the media that this season was the worst-ever season for a team defending their Super Bowl title, although there is no known statistic kept for such a dubious honor.