Jason Kueffler came to OPSU from Northern State University in Aberdeen, S.D. in the fall of 2004. At NSU, he spent one season as the pitching and assistant strength and conditioning coach and then one season as the assistant coach. While at NSU, he coached Deacon Burns, who the Minnesota Twins selected in the 26th round of the 2004 MLB draft.

In his first season at OPSU, Kueffler led the Aggies to 11 wins, more than OPSU had in the three previous years combined. The 2005 Aggies were also in the top five in the nation in stolen bases and stolen base percentage. He needs only five wins in the 2006 season to become the all-time winningest coach baseball coach in OPSU history.

Kueffler has a Bachelor's degree in Fitness Management and Management Information Systems and a Master's of Science in Education in Health, Physical Education and Coaching from NSU. In addition to his coaching responsibilities, he is an adjunct professor of Health and Physical Education.