IROC XXIII
The twenty-third season of IROC, the, started on February 12, 1999. IROC XXIII was the year that witnessed the closest race and points battle ever. It was held at Michigan International Speedway in which Dale Earnhardt beat his son Dale Earnhardt, Jr. The other three contested races were held at Daytona International Speedway, Talladega Superspeedway, and Indianapolis Motor Speedway. Earnhardt won the first three races of the season. Including two last lap passes at Daytona and Talladega.
The roster of drivers and final points standings were as follows:
| Position | Driver | Points | Winnings | Series |
| 1 |  Dale Earnhardt | 75 | $225,000 | NASCAR Winston Cup |
| 2 | Mark Martin | 74 | $100,000 | NASCAR Winston Cup |
| 3 | Bobby Labonte | 53 | $60,000 | NASCAR Winston Cup |
| 4 | Rusty Wallace | 50 | $50,000 | NASCAR Winston Cup |
| 5 | Jeff Gordon | 49 | $45,000 | NASCAR Winston Cup |
| 6 |  Kenny Bräck | 34 | $40,000 | Indy Racing League |
| 7 | Eddie Cheever | 31 | $40,000 | Indy Racing League |
| 8 | Dale Jarrett | 30 | $40,000 | NASCAR Winston Cup |
| 9 | Dale Earnhardt Jr. | 29 | $40,000 | NASCAR Busch Series |
| 10 |  Adrian Fernandez1 | 28 | $40,000 | FedEx CART World Series |
| 11 | Jeff Burton | 26 | $40,000 | NASCAR Winston Cup |
| 12 |  Greg Moore | 25 | $40,000 | FedEx CART World Series |
