Kenneth Dale Irwin Jr. (August 5, 1969 – July 7, 2000) was an American stock car racing driver. He had driven in all three NASCAR national touring series, and had two total victories, both in the Craftsman Truck Series. Before that, he raced in the United States Auto Club against Tony Stewart, who was one of his fiercest rivals. He died as a result of injuries suffered in a crash during a practice session at New Hampshire Motor Speedway.