After ranking fourth with Wissota and earning Rookie of the Year honors in 2005, Lee took to the road along with his grandfather and legendary car owner Doug Howells with the ASCS Northern Plains Region in 2006 and immediately established himself as one of the series' frontrunners.

Lee ranked fourth in the inaugural season of Northern Plains action before vaulting to the number one position over each of the following two seasons, claiming top honors in the 2007 edition of North Central Speedway's Mighty Axe Nationals before adding a second series win at Brainerd in 2008.

Lee has accumulated 29 top-ten feature finishes while competing in 49 of the 51 ASCS Northern Plains events contested over the past four years. Lee ranked fourth in Northern Plains points last year, while also ranking seventh in Midwest points.

A top-ten finisher in ASCS National action at Denison, Brainerd and Huron in 2007, Lee earned his top National finish to date with a fifth-place run in the 2008 edition