Carl Renezeder again raced Pro 4 and Pro 2 for 2011, and won the Pro 4 Championship. For the Challenge Cup, he chose to race his No. 17 2WD truck. He and No. 99 Robby Woods, also racing a Pro 2 truck, would go a number of laps practically right on top of each other. They swapped spots and seemed stuck together through turns and over the jumps.