TMZ.com adds that the Medical Examiner in Pinellas County, Florida did not notice "extensive trauma" to his body while conducting the autopsy.
Toxicology results are expected to be released in four to six weeks. It was previously reported that the police didn't suspect that drugs or alcohol were involved.
Savage died in a car accident Friday in Seminole, Florida when his 2009 Jeep Wrangler veered across a concrete median, through oncoming traffic, and "collided head-on with a tree."
Savage was pronounced dead at Largo Medical Center while his wife Barbara Lynn suffered minor injuries.
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