TMZ:

TMZ spoke with Randy’s brother, Lanny Poffo, who tells us the wrestling legend suffered a heart attack while he was behind the wheel around 9:25 AM … and lost control of his vehicle.
Earlier this month, Savage celebrated his 1-year anniversary with his new wife Lynn.
Savage was 58.
Macho Man began wrestling in the WWF in 1985 and became a superstar with his trademark catchphrase “Ooooooh Yeaahhhhh.”
UPDATE: Florida Highway Patrol tells TMZ … Savage was driving his 2009 Jeep Wrangler when he veered across a concrete median … through oncoming traffic … and “collided head-on with a tree.”
Savage was transported to Largo Medical center, where he died from his injuries.