[4] He moved to Irvine, California when he was 14, and played boys' soccer at Mission Viejo High School where he was a four-year starter.

While at UCLA, he played with future national team teammates Brad Friedel, Chris Henderson and Cobi Jones.

As a freshman, he scored 11 goals, assisted on ten others and was named to the Soccer America Magazine's All-Freshman team.

With a lull in national team games following the World Cup, USSF decided to move several players overseas.

However, he showed up injured and played poorly through his first four games, so MLS replaced him with Moore on the Revolution roster on July 24, 1996.

[9] Moore finished the 1996 New England Revolution season as the team's inaugural scoring champion, with 11 goals and 1 assist.

[9] During his tenure with the Revolution, Moore became the club's all-time leading scorer and made the 1999 MLS All Star team.

In November–December 1997, Moore spent a month on loan from the Revs to Club Sport Emelec[10] of the Ecuadorian First Division following the end of the MLS season where he yearned to be close to his family recently residing in Tulsa, Oklahoma.

[15] He tallied 3 more goals in the following four league matches, notching against Wimbledon F.C., Derby County F.C., and West Ham United F.C.

Moore had suffered a knee injury in the U.S. game against Portugal at the 2002 FIFA World Cup and did not play for Everton in the next season.

[citation needed] Moore had reconstructive surgery on his right knee for a damaged medial collateral ligament on January 25, 2005.

Two days later, he announced his retirement from professional soccer, saying, "After numerous attempts to strengthen and stabilize my knee through rehab, it became clear that I had no alternative but to have reconstructive surgery.

Beginning in 1988, the United States Soccer Federation (USSF) had begun to sign top U.S. players to contracts, making the U.S. national team a de facto professional club.

Moore chose to not return to UCLA for his senior year and joined USSF as a full-time national team player.

Moore became the sixth U.S. player to earn 100 caps, doing so against Poland in the team's 2002 World Cup group finale.

His 24 goals for the U.S. rank him sixth in national history, behind Landon Donovan, Clint Dempsey, Eric Wynalda, Brian McBride and Jozy Altidore.

Moore was to appear in a charity match for Hollywood United FC against Los Angeles Galaxy on November 4, 2007.

Proceeds were to go the American Red Cross and The Salvation Army to benefit those affected by the wildfires in Southern California.

By the end of the tournament the drink was being consumed almost exclusively by players at mealtimes, and has continued to spread up and down the east coast.