Kiel, 27, was driving alone after leaving a party at about 10:15 Friday night when he hit a wall in San Diego’s upscale Scripps Ranch neighborhood and was thrown from the car, police Sgt. Alan Hayward said.

Kiel was barely breathing when paramedics reached him and he died about an hour later, Hayward said.

Friends had tried to keep Kiel from driving home from the party, Hayward said, and witnesses told police he appeared to be driving in the wrong direction when he crashed.

Police would not know whether Kiel had been under the influence of drugs or alcohol until toxicology tests were performed, Hayward said.

A second-round draft pick out of Texas A&M in 2003, Kiel played four years in the NFL from 2003-2006, all with the Chargers.

In February 2007 he pleaded guilty to felony and misdemeanor drug charges for shipping prescription cough syrup to Texas, the most significant of several scrapes with the law.

He was released by the team after his plea.