Rough day started before Sunday’s game for Vincent Jackson

Bad things began happening to the Chargers even before Sunday’s heartbreaking 17-14 playoff loss to the New York Jets, when a starting wide receiver was pulled over and cited for driving on a suspended license, according to police Monday.

Receiver Vincent Jackson, who has twice been arrested on suspicion of driving under the influence of alcohol, was pulled over before the game, San Diego police Det. Gary Hassen said.

“One of our traffic (officers) was working a radar when a car drove by with loud music, and the tag on the car was expired,” Hassen said.

Driving on a suspended license is a misdemeanor, but the officer has the option to simply cite and release the driver, Hassen said.

Since there were no extenuating circumstances, the officer let him go and impounded the vehicle, he said.

Hassen did not have details on when or where Jackson was pulled over.

Jackson, who caught seven passes for 111 yards in the losing effort, was arrested for DUI last January, and was convicted of the offense in 2006.

Prosecutors said he had a .17 blood-alcohol level in the unresolved 2009 case — more than twice the legal limit. That arrest took place just days before a playoff loss in Pittsburgh.