Jeff Sperbeck, a business partner of John Elway, died Wednesday.

Former NFL star John Elway’s longtime business partner and former agent died Wednesday after reportedly falling from a golf cart.

Jeff Sperbeck, 62, died Wednesday after an accident Saturday evening in La Quinta, California, the Riverside County Coroner confirmed to ABC News.

In this Nov. 7, 2021, file photo, Denver Broncos president of Football Operations John Elway stands on the sidelines during the game against the Dallas Cowboys at AT&T Stadium in Arlington, Texas.

Richard Rodriguez/Getty Images, FILE

It was not confirmed yet who was driving the golf cart.

The California Department of Forestry and Fire Protection (CAL Fire) responded to a 911 call about a person falling from a golf cart on the 53200 block of Humboldt Blvd in La Quinta. Emergency personnel transported the injured person to a nearby trauma center with serious injuries, officials said.

The Riverside County Sheriff’s Department is investigating the incident, though sources familiar with the matter tell ABC News the investigation is in its preliminary stages. Because the incident occurred in a private community and involved a golf cart rather than a regular vehicle, standard traffic laws may not apply.

Elway, a Hall of Fame quarterback, spent his entire 16-year NFL career with the Denver Broncos, leading the team to two Super Bowl victories.

The NFL star later served as the Broncos’ general manager and executive vice president before transitioning to a consultant role, which ended in March 2023.

Sperbeck had represented over 100 football players in his 30-year career as an NFL agent.