He was chosen 49th overall in the 2004 NHL Entry Draft by the St. Louis Blues. Soderberg opted to remain in his hometown, playing for the Redhawks, until June 1, 2006, when the Blues signed him. He attended the 2006 training camp and was assigned to the Blues' farm team the Peoria Rivermen. Soderberg chose to return to Sweden rather than report to Peoria.
Soderberg played for Sweden in the following: