Music blared louder than normal in the San Diego Chargers’ locker room, and there was a sense of relief Thursday night after a victory over the Denver Broncos.

The Chargers had actually finished.

Philip Rivers threw for 178 yards and one touchdown, passing Hall of Famer Dan Fouts to become San Diego’s career passing leader, and the Chargers held off the Broncos 21-13.

The victory may have saved embattled coach Mike McCoy’s job .

The Chargers (2-4) were coming off a mistake-filled loss at Oakland, and earlier in the season lost three games in which they led at the 2-minute warning. There has been increasing fan discontent with the conservative McCoy, and the Chargers are trying to convince voters to approve a $1.1 billion public handout for a new downtown stadium in the form of an increase in the hotel occupancy tax.

The Broncos had the ball in the final seconds, but the Chargers — who had two turnovers on special teams —held.

The defending Super Bowl champion Broncos were coached by special teams coordinator Joe DeCamillis after Gary Kubiak was ordered by doctors to sit this one out because of a migraine condition that mimics strokes.

The five-time defending AFC West champion Broncos (4-2) were mostly sluggish behind Trevor Siemian, who was back at quarterback after rookie Paxton Lynch struggled in a loss to Atlanta. They lost their second straight game and had their NFL-record 15 straight divisional road victories snapped.