Dave Tollefson played outside linebacker at Los Medanos College in 1999 and 2000, and Fresno State University awarded Tollefson an athletic scholarship for defensive end. However, he suffered a series of injuries that made him miss three seasons. He missed the 2001 season due to right shoulder surgery to repair a torn labrum. Then, he spent the 2002 season working at Home Depot, undergoing surgery on his right shoulder to clean up debris. In 2003, he enrolled at Northwest Missouri, but did not play; he was granted a medical hardship after suffering a broken bone in his right foot in August camp. He said that the summer before entering Northwest Missouri, he worked as a carpenter.