A business partner and former agent for Pro Football Hall of Famer John Elway has died after suffering an injury at a Southern California golf resort

Authorities are investigating the death of sports agent Jeff Sperbeck, a longtime friend and business partner of legendary NFL star John Elway. The sheriff’s office says 62-year-old Sperbeck died Wednesday morning from “serious injuries” he sustained after falling off a golf cart.

Jeff Sperbeck's loved ones are publicly mourning his death for the first time, just days after the longtime NFL agent and close associate of John Elway died from a traumatic brain injury sustained in a golf cart accident.