, 1998 Irwin began his major-league NASCAR career in the
Craftsman Truck Series. He made his debut in that series in 1996 at
Phoenix International Raceway, driving the No. 26
Ford F-150 for
MB Motorsports. He started and finished 32nd after an engine failure. In his second start at
Richmond International Raceway, he won the pole in the No. 62
Raybestos Ford for
Liberty Racing, finishing fifth in the event. Irwin moved up to drive full-time in 1997, driving the No. 98 Ford for
Liberty Racing. He had two wins, seven top-fives, and ten top-ten finishes that season, on his way to a tenth-place finish in the final point standings. He also won
Rookie of the Year honors that season. Irwin also made his debut in the
Winston Cup Series in 1997 with
David Blair Motorsports at Richmond. He qualified on the outside pole and led for twelve laps, finishing in eighth place. He ran three more races with Blair that season, qualifying no worse than eleventh. Irwin won the 1998 Rookie of the Year award in the Cup Series driving the
Robert Yates Racing No. 28 car, replacing
Ernie Irvan. Irwin started the 1998 season by winning the
Automobile Racing Club of America race in Daytona in February in a car owned by Yates. During that season, he had one pole, one top-five, and four top-ten finishes on his way to a disappointing 28th-place finish in the final points standings. In 1999, he had two poles, two top-five and six top-ten finishes and finished nineteenth place finish in the final points standings. Irwin made his debut in the NASCAR
Busch Series in 1999, driving the No. 11
Ford Taurus owned by his teammate,
Dale Jarrett, and then-
Green Bay Packers quarterback
Brett Favre. He had two fifth-place finishes in five starts in the series during the 1999 season, at
Texas Motor Speedway and
Dover International Speedway, respectively. Irwin is also known for one incident where he bumped the car of
Tony Stewart, a former rival of his in USAC open-wheel competition, into the wall in the NAPA Autocare 500 at Martinsville Speedway. After Stewart wrecked Irwin twice in the same race in turn four, Irwin retaliated against Stewart by spinning him in turn 1 on the restart. Stewart exited his wrecked car, clapped at Irwin, threw his gloves at his car, and tried to enter Irwin's car as it was driving under the caution flag in a show of displeasure. For the 2000 season, Irwin was tabbed by
Felix Sabates to replace
Joe Nemechek in
Team SABCO's No. 42 Chevrolet. He had a single top-ten finish, fourth at
Talladega Superspeedway, in his first seventeen races with the team. He made nine starts in the Busch Series for SABCO as well, posting a best finish of ninth at Talladega. His final race for the team was at
Daytona International Speedway in the
Pepsi 400, finishing 22nd; he was seen as having a bright future with the team, which had just had a majority interest purchased by
Chip Ganassi. ==Death==