After playing college soccer for the University of New Haven, Serioux started his pro career with the Toronto Lynx in the A-League.

Serioux is known to have one of the longest throws in the sport, once setting up a goal against Leicester City, from a throw-in at the halfway line.

[6] Serioux joined the MLS in March 2006, signing with the MetroStars,[7] leaving England in order to take care of his ill mother.

[8] However, he never played for the club, and was traded to Houston Dynamo in exchange for Danny O'Rourke before the regular season started.

In May 2008, Serioux was fined $1,000 for a dangerous tackle on David Beckham, after telling The Sun newspaper that he and a few other players would be "going after" the England international midfielder.