College and amateur

Muñoz attended Los Alamitos High School playing for the soccer team. In 2001, a talent scout set up a tryout for him with the San Jose Earthquakes and arranged offers for tryouts with professional club teams in Sweden and Norway. After a one-day tryout with the Earthquakes, was offered a contract, but did not sign, deciding to finish out his high school season.^[1]

He played college soccer at the University of California, Berkeley. In his first three seasons he started 60 out of 63 matches.^[2] As a freshman he garnered 2nd Team All Pac-10 and 3rd Team All-West Region honors, and in his sophomore and junior year he notched First Team All-Pac-10 and 2nd Team All West-Region.^[3] He was also a two-year captain for the Golden Bears his junior and senior year. However, four games into his senior season he tore his right MCL and was out for the rest of the year.^{[citation needed]} In 2002, Muñoz was offered a two year contract deal in Norway from Fredrikstad FC, but chose not to sign.^{[citation needed]}

During his college years he also played for Orange County Blue Star in the USL Premier Development League.

Professional

Muñoz was selected in the third round of the 2005 MLS Supplemental Draft by Chivas USA.^[4] He made his professional debut on August 13 against D.C. United.^[5] In September 2006 he underwent arthroscopic ankle surgery, which sidelined him for the rest of the season, having appeared in just one game.^[6] He was waived by the club at the end of the 2006 season, after having suffered an ankle injury during the season.^[7]

After leaving Chivas, Muñoz signed with the California Victory of the USL First Division.^[7] He scored the first league goal in Victory history on April 28, 2007 against the Vancouver Whitecaps FC.^[8] The goal was awarded Goal Of The Week honors, and saw him named part of the USL First Division Team Of The Week on April 30, 2007.^[9][10] Muñoz left the Victory when the team folded at the end of the 2007 season.^[7] After the season, his girlfriend, Patty Rodriguez, started a petition trying to get Chivas to sign him again, with the petition gaining the support of television and radio personality Ryan Seacrest, for whom Rodriguez worked as an assistant producer on On Air with Ryan Seacrest.^[11]

Ahead of the 2008 season, he had trials with Chivas, the San Jose Earthquakes, as well as in Puerto Rico and Seattle.^[12] After a short stint with Los Angeles-based amateur team Hollywood United, who he helped qualify for the Lamar Hunt US Open Cup for the first time in 2008,^[13] and having played several games for the LA Galaxy's reserves, Munoz was signed to a contract with LA Galaxy on August 1, 2008.^[14] He made his first team debut with the Galaxy on September 6, 2008, coming on as a second half substitute against Real Salt Lake.^[5]

In 2009, he played with the Orange County Blue Star in the Premier Development League.^[15] Later that year, he decided to retire from the sport.^[3]

International

In 2002, Muñoz was part of the United States U20 team under head coach Thomas Rongen.^{[citation needed]}