The Eagles' best performances under Clark may have come in defeats against teams ranked significantly higher than the U.S., including 26–22 vs. Australia, 25–18 vs. Ireland, 28–23 vs. Wales, and three losses to Argentina by a total of 14 points, the closest of which was a 29–26 result.
In the 1999 Pacific Rim Tournament, used as a lead-up to the RWC, Clark's Eagles defeated Tonga 30–10, Fiji 25–14 and Canada 18–17 before losing a tight decision to Samoa, 20–27, in Apia.
The USA was assigned to Pool E of the 1999 RWC in Ireland, where the Eagles were defeated by the hosts 8–53 in their opening game before losing a 25–27 heartbreaker to Romania.
In the team's final RWC match of that year, the Eagles lost to eventual champion Australia, 55–19, with the U.S. registering four Kevin Dalzell penalties and scoring the only try yielded by the Wallabies in the entire tournament.
In this role, Clark represented USA Rugby in the founding of the Pacific Rim and Super Cup International test competitions.
Clark is a frequent guest lecturer and presenter in academia, the corporate world and sports community on his expertise, "The Values of High-Performance Teams."
Clark's work with corporations spans many industries, including bio tech, gaming, information technology, apparel/footwear manufacturing, legal, financial services, telecommunications, real estate and venture capital.
His client list includes companies such as AT&T, Bessemer Venture Partners, Genentech, Goldman Sachs, Kabam, Oracle, and Orrick, Herrington & Sutcliffe.