Former Atlanta Braves pitcher Tommy Hanson died of cocaine and alcohol toxicity ... according to the autopsy results.
Hanson, who was only 29, died on November 9th -- he was found unresponsive at a friend's home in the Atlanta area. At the time of his death, the coroner listed "overdose" as a possible cause of death.
We spoke with the coroner who tells us the autopsy showed Hanson died from the combination of cocaine and booze.
Hanson played 5 seasons in the MLB.