[3] Cannon was not drafted by a Major League Soccer team and instead signed with the San Diego Flash of the A-League in 1998.

[7][8] After a season with the Flash, he was signed by Major League Soccer team San Jose Earthquakes.

[8] After starting goalkeeper David Kramer tore the labrum in his shoulder, Cannon was promoted to the first team for the Quakes.

[3] Cannon's Major League Soccer contract expired following the 2002 season and he attempted to play for a European team.

[10] After an unsuccessful trial with Feyenoord, he signed a six-month contract with RC Lens of France's Ligue 1.

I can compete for the job anywhere, and may the best man win.Cannon was initially behind incumbent goalkeeper Scott Garlick, but Rapids coach Tim Hankinson controversially promoted Cannon into the starting role for the 2003 playoffs.

[3] In December 2006, Cannon was traded to the Los Angeles Galaxy for Herculez Gomez and Ugo Ihemelu.

[23][24] Cannon's grandfather and father are Canadian, which made him eligible for the Canada men's national soccer team.

[25] In March 2014, Cannon was announced as a color commentator for San Jose Earthquakes radio broadcasts on KLIV.