For the first time since 2010, the Denver Broncos were dealt a road loss from an AFC West opponent, snapping an NFL-record 15-game winning streak on the road against divisional opponents. They lost to the San Diego Chargers in Week 6, falling 21-13 on Thursday Night Football.

The Broncos snagged the record with a wacky victory over the Kansas City Chiefs in Week 2 of the 2015 season, in which Denver scored two touchdowns in a nine-second span to take a 31-24 lead with 27 seconds remaining. Not many of the wins over the 15-game streak were that close, though, as the Broncos earned AFC West titles in each of the last five seasons and a Super Bowl title last season.

The last team in the AFC West to host the Broncos and win prior to 2016 was the Raiders in 2010, when they dealt Denver a 39-23 loss in Week 15. The loss dropped the Broncos to 3-11 and came shortly after Josh McDaniels was fired as the team's head coach.

Prior to Denver's 15-game hot streak on the road, the record for road dominance of divisional opponents belonged to the San Francisco 49ers, who rattled off 12 straight road wins over divisional opponents from 1987-90.

The full list of road wins for the Broncos during the streak is as follows:

Year Week Team Score 2011 9 Raiders 38-24 2011 10 Chiefs 17-10 2011 12 Chargers 16-13 (OT) 2012 6 Chargers 35-24 2012 12 Chiefs 17-9 2012 14 Raiders 26-13 2013 10 Chargers 28-20 2013 13 Chiefs 35-28 2013 17 Raiders 34-14 2014 10 Raiders 41-17 2014 13 Chiefs 29-16 2014 15 Chargers 22-10 2015 2 Chiefs 31-24 2015 5 Raiders 16-10 2015 13 Chargers 17-3

It's hard to believe that the streak started back in 2011, when now-Super Bowl MVP Von Miller was just a rookie. In that span, Tim Tebow had also taken over for Kyle Orton at quarterback, Peyton Manning became their quarterback and retired, and Gary Kubiak took over as head coach.

On Thursday night, Kubiak wasn't on the sidelines after suffering a "complex migraine" on Sunday. Special teams coordinator Joe DeCamillis filled in as head coach for the game. First-year starter Trevor Siemian was under center after sitting out Week 5 due to a shoulder injury.

With the loss to the Chargers, Denver drops to 4-2 on the season, and they will next play the Houston Texans at home in Week 7.