TAMPA, Fla. - An autopsy on pro wrestler Brian "Crush" Adams failed to show a specific cause of death. The Hillsborough County medical examiner's office said Tuesday it will now conduct tissue and toxicology tests to try to determine what killed the 44-year-old wrestler.

This photo provided by World Wrestling Entertainment, Inc., shows wrestler Brian 'Crush' Adams posed on April 17, 2000. (AP Photo/WWE)

A completed autopsy report is expected in six to eight weeks.

Adams wasn't breathing when his wife found him unconscious in their Tampa home Monday. His body showed no visible signs of injury and foul play was not suspected, police said.

Adams, a former world tag team champion, last performed for the World Wrestling Federation in 2001 and served intermittently on the roster beginning in 1990, World Wrestling Entertainment said.

In 2001, Adams left the WWE, formerly the WWF. He competed in Japan and then attempted a career in boxing, the WWE said. He wrestled his last match in January 2003 when a spinal injury forced him into retirement.

Adams' death comes less than two months after pro wrestler Chris Benoit killed his wife and son before hanging himself on the cable of a weight machine in his Georgia home. Prescription anabolic steroids were found in the family's home, raising questions about whether the drugs played a role in the killings.