John Elway's longtime NFL agent Jeffrey Sperbeck dies at 62 after fall from golf cart in California

Jeffrey Sperbeck, longtime friend and former agent of NFL legend John Elway, has died at the age of 62 after being injured in a golf cart incident in La Quinta, the Riverside County Sheriff's Office confirmed.

Firefighters from CAL FIRE/Riverside County Fire Department responded to the 53200 block of Humboldt Boulevard on Saturday after receiving calls that someone had fallen from a golf cart.

A witness said she saw Elway frantically trying to get help after Sperbeck fell out of the cart.

"He was unfortunately lying on the ground and there were people surrounding him trying to make sure he was okay," witness Ali Simon said. "He was on the phone, trying to call 9-1-1, trying to call anyone."

The engine company officer said one person had suffered serious injuries and was transported to a local trauma center. The coroner's office says Sperbeck died on Wednesday morning at Desert Regional Medical Center.

The Riverside County Sheriff's Office is continuing to investigate the incident. 

In a written statement, Elway expressed his grief after his close friend's death. 

"There are no words to truly express the profound sadness I feel with the sudden loss of someone who has meant so much to me," Elway wrote. "Jeff will be deeply missed for the loyalty, wisdom, friendship and love he brought into my life and the lives of so many others."

Elway is a Super Bowl-winning quarterback who played for the Denver Broncos in the 1980s and 90s and is a member of the Pro Football Hall of Fame. He returned to the Broncos as general manager many years after his retirement and constructed the roster of the team that won Super Bowl 50.

KCAL News has reached out to the Madison Club in La Quinta for a comment.