IROC XXII
The twenty-second season of the International Race of Champions started on February 13, 1998. The series used identically prepared Pontiac Firebird Trans Am race cars, and contested races at Daytona International Speedway1, California Speedway, Michigan International Speedway, and Indianapolis Motor Speedway. Mark Martin won the IROC championship, his third straight and fourth in five seasons.
The roster of drivers and final points standings were as follows:
| Position | Driver | Points | Winnings | Series |
| 1 |  Mark Martin | 86 | $225,000 | NASCAR Winston Cup |
| 2 | Jeff Burton | 57 | $100,000 | NASCAR Winston Cup |
| 3 | Jeff Gordon | 51 | $60,000 | NASCAR Winston Cup |
| 4 | Al Unser, Jr. | 46 | $50,000 | CART World Series |
| 5 | Terry Labonte | 39 | $45,000 | NASCAR Winston Cup |
| 6 | Tony Stewart | 37 | $40,000 | Indy Racing League |
| 7 | Dale Earnhardt | 36 | $40,000 | NASCAR Winston Cup |
| 8 | Jimmy Vasser | 34 | $40,000 | CART World Series |
| 9 | Randy LaJoie | 31 | $40,000 | NASCAR Busch Series |
| 10 | Dale Jarrett | 29 | $40,000 | NASCAR Winston Cup |
| 11 | Tommy Kendall | 28 | $40,000 | SCCA Trans-Am Series |
| 12 |  Arie Luyendyk | 26 | $40,000 | Indy Racing League |
Race results
- Jeff Gordon
- Jeff Burton
- Mark Martin
- Dale Earnhardt
- Arie Luyendyk
- Dale Jarrett
- Terry Labonte
- Al Unser, Jr.
- Tony Stewart
- Jimmy Vasser
- Randy LaJoie
- Tommy Kendall
California Speedway, Race Two
- Mark Martin
- Al Unser, Jr.
- Jeff Gordon
- Terry Labonte
- Jeff Burton
- Randy LaJoie
- Tony Stewart
- Dale Jarrett
- Jimmy Vasser
- Dale Earnhardt
- Arie Luyendyk
- Tommy Kendall
Michigan International Speedway, Race Three
- Jeff Burton
- Mark Martin
- Tony Stewart
- Dale Earnhardt
- Tommy Kendall
- Terry Labonte
- Arie Luyendyk
- Jeff Gordon
- Randy LaJoie
- Dale Jarrett
- Jimmy Vasser
- Al Unser, Jr.
Indianapolis Motor Speedway, Race Four
- Mark Martin
- Al Unser, Jr.
- Jimmy Vasser
- Randy LaJoie
- Terry Labonte
- Tony Stewart
- Dale Jarrett
- Dale Earnhardt
- Jeff Gordon
- Tommy Kendall
- Arie Luyendyk
- Jeff Burton
- This was the first appearance for IROC at Indianapolis. It was a support event for the Brickyard 400.
- Mark Martin started last and won the race.
- This was Al Unser, Jr.'s first appearance at the Indianapolis Motor Speedway since failing to qualify at the 1995 Indy 500.
