Gregg, along with his brother Duane, moved back to Macon, GA after a short stay in L.A. and together "founded" Southern Rock. Shortly thereafter, Duane Allman was killed in a motorcycle accident. The band produced many classic albums.
Gregg punished his body with drugs and alcohol. Willie Nelson, while presenting the Rock and Roll Hall of Fame award to Gregg in 1995 warned him to sober up if he wanted to live any longer. And he did.