Team USA track and field star Torrin Lawrence, of Jacksonville, died after an interstate crash about 1:45 a.m. Monday on Interstate 75 near exit 94.
According to a report, Lawrence's car was hit by a tractor-trailer after a tire blew out and his car came to a stop in the middle of traffic.
Crisp County Sheriff Billy Hancock said Lawrence called for assistance from authorities, but the vehicle was not moved from the flow of traffic. It was not immediately known if the vehicle was immobilized after the blowout.
Officials said Lawrence was sitting inside the car when the big rig collided with it. He was thrown from the car on impact and killed.
The driver of the truck was injured in the crash and was taken to a hospital, but was expected to be OK.
Georgia State Patrol was called to investigate the crash.
Lawrence was a Jacksonville native and a member of the University of Georgia's track and field team. Hancock said Lawrence was returning home to Jacksonville after training in Athens, where he won an NCAA indoor title for the Bulldogs in 2010.
The 25-year-old earned All-American honors as a sprinter before joining Team USA. He ran for the United States in the opening round of the 4x400 relay at the IAAF World Relays in the Bahamas in May. The team went on to capture the gold medal.