IROC I
Motor car races held in 1973–1974
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IROC I was the inaugural International Race of Champions, which was held at two tracks over two weekends in 1973 and 1974. The first three races were held October 27 and 28, 1973 at Riverside International Raceway and the final race was held on the Daytona International Speedway road course on February 14, 1974. Champion Mark Donohue won $54000 and the championship, which was determined by prize money rather than points. The races were contested in Porsche Carrera RSR race cars. This was the only IROC to be contested entirely on road courses. Only the top 6 finishing drivers competed in all four races.
The roster of drivers and final points standings were as follows:[1]
| Rank | Driver | Winnings | Series |
|---|---|---|---|
| 1 |  Mark Donohue | $54,000 | SCCA Can-Am |
| 2 | Peter Revson | $21,200 | SCCA Can-Am Formula One |
| 3 | Bobby Unser | $19,100 | USAC Champ Car |
| 4 | David Pearson | $14,600 | NASCAR Winston Cup |
| 5 | George Follmer | $16,000 | SCCA Can-Am |
| 6 | A. J. Foyt | $9,900 | USAC Champ Car |
| 7 |  Emerson Fittipaldi | $8,300 | Formula One |
| 8 |  Denny Hulme | $6,000 | Formula One |
| 9 | Bobby Allison | $5,400 | NASCAR Winston Cup |
| 10 | Richard Petty | $5,400 | NASCAR Winston Cup |
| 11 | Gordon Johncock | $5,100 | USAC Champ Car |
| 12 | Roger McCluskey | $5,000 | USAC Champ Car |
Note: Jackie Stewart was originally scheduled to compete but retired from racing two weeks prior to the first race. He was replaced by A.J. Foyt, who had previously declined an invitation saying the all road course format was unfair to oval racers.[2]
Race results
Riverside International Raceway, Race One
- 2- Mark Donohue
- 7- Bobby Unser
- 3- Peter Revson
- 4- George Follmer
- 6- Denis Hulme
- 8- A. J. Foyt
- 10- Richard Petty
- 12- Roger McCluskey
- 5- David Pearson
- 11- Gordon Johncock
- 9- Bobby Allison
- 1- Emerson Fittipaldi
Riverside International Raceway, Race Two
- 4- George Follmer
- 9- David Pearson
- 12- Emerson Fittipaldi
- 3- Peter Revson
- 6- A. J. Foyt
- 2- Bobby Unser
- 11- Bobby Allison
- 5- Denis Hulme
- 10- Gordon Johncock
- 7- Richard Petty
- 8- Roger McCluskey
- 1- Mark Donohue
Riverside International Raceway, Race Three
- 12- Mark Donohue
- 6- Bobby Unser
- 3- Emerson Fittipaldi
- 2- David Pearson
- 1- George Follmer
- 5- A. J. Foyt
- 4- Peter Revson
- 8- Denis Hulme
- 7- Bobby Allison
- 10- Richard Petty
- 9- Gordon Johncock
- 11- Roger McCluskey
Daytona International Speedway, Race Four
- 1- Mark Donohue
- 2- Peter Revson
- 5- Bobby Unser
- 3- David Pearson
- 4- George Follmer
- 6- A. J. Foyt