Seventeen years later, he will be a part of what has become a much different promotion.
Shamrock and Impact both confirmed that "The World's Most Dangerous Man" will be part of the company's TV tapings in Las Vegas on September 5 and 6.
The 55-year-old MMA legend is working an angle with Moose on Twitter in order to set up his appearance, though it's not clear whether or not he'll be wrestling on either night.
As noted, Shamrock was part of NWA-TNA's launch in June of 2002, becoming the first champion of the company's lifetime. He lost the belt seven weeks later to Ron "The Truth" Killings (R-Truth) before leaving to resume his MMA career in UFC.
Shamrock briefly reappeared in TNA in the summer 2004. Over the past year, he has been a semi-regular for the Battle Championship Wrestling promotion based in Australia.