Klaas played one season with the
Chicago Fire Premier of the fourth division
Premier Development League in 2001. The
San Jose Earthquakes of
Major League Soccer selected Klaas in the third round (thirty-second overall) in the
2005 MLS SuperDraft. The Chicago Storm of
Major Indoor Soccer League also selected Klaas with the second pick of the 2005 MISL College Draft. Klaas chose not to sign with either the Earthquakes or Storm in order to finish his degree. After completing it, he joined the
Seattle Sounders of the
USL First Division. Klaas quickly cemented himself as a critical cog in the Sounders defensive scheme over the next two seasons. However, he left the Sounders after the 2006 season. ==Post-soccer career==