1966
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| | | USAC National Championship | | Position: 7 (1135 points) | 14 races. 1 win. 3 pole positions. 1 podium. ? fastest laps. | | Team: Leader Card Racers | | Car: Gerhardt (Ford) | | Car: Watson D (Offenhauser) | | Car: Watson FE (Offenhauser) | | Complete results needed. |
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1965
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| | | USAC National Championship | | Position: 4 (1875 points) | 17 races. 3 wins. 1 pole position. 3 podiums. ? fastest laps. | | Team: Leader Card Racers | | Car: Watson (Offenhauser) | | Car: Watson RE (Offenhauser) | | Car: Watson D (Offenhauser) | | Complete results needed. |
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1964
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| | | USAC National Championship | | Position: 4 (1700 points) | 12 races. 0 wins. 1 pole position. 8 podiums. ? fastest laps. | | Team: Leader Card Racers | | Car: Watson (Offenhauser) | | Car: Watson RE (Offenhauser) | | Complete results needed. |
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1963
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| | | USAC National Championship | | Position: 5 (1352 points) | 11 races. 0 wins. 0 pole positions. 2 podiums. ? fastest laps. | | Team: Leader Card | | Car: Watson (Offenhauser) | | Complete results needed. |
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1962
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| | | USAC National Championship | | Position: 4 (1700 points) | 13 races. 2 wins. 0 pole positions. 6 podiums. ? fastest laps. | | Team: Hopkins Racing, Leader Card, Sclavi | | Car: Kuzma D (Offenhauser) | | Car: Epperly (Offenhauser) | | Car: Kuzma (Offenhauser) | | Car: Watson D (Offenhauser) | | Car: Watson (Offenhauser) | | Complete results needed. |
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1961
| | USAC National Championship | | Position: 12 (530 points) | 12 races. 0 wins. 1 pole position. 1 podium. ? fastest laps. | | Team: Hoover Motor Express, Hopkins Racing | | Car: Kuzma D (Offenhauser) | | Car: Epperly (Offenhauser) | | Car: Kuzma (Offenhauser) | | Complete results needed. |
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1960
| | USAC National Championship | | Position: 3 (1220 points) | 12 races. 0 wins. 5 pole positions. 1 podium. ? fastest laps. | | Team: Bob Estes | | Car: Philipp (Offenhauser) | | Car: Philipp D (Offenhauser) | | Complete results needed. |
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| | | Formula 1 | | Position: 19 (3 points) | | | The results for the Indianapolis 500 is accounted for in the USAC championship.. | | Car: Phillips (Offenhauser) | | Complete results needed. |
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1959
| | USAC National Championship | | Position: 7 (780 points) | 12 races. 0 wins. 3 pole positions. 3 podiums. ? fastest laps. | | Team: Bob Estes | | Car: Phillips D (Offenhauser) | | Car: Phillips (Offenhauser) | | Complete results needed. |
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1958
| | USAC National Championship | | Position: 9 (790 points) | 10 races. 0 wins. 1 pole position. 1 podium. ? fastest laps. | | Team: Hoover Motor Express, Hardwood Door, Bob Estes | | Car: Phillips (Offenhauser) | | Car: Kurtis 4000 (Offenhauser) | | Car: Silnes D (Offenhauser) | | Car: Silnes (Offenhauser) | | Complete results needed. |
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1957
| | USAC National Championship | | Position: 19 (280 points) | 8 races. 0 wins. 0 pole positions. 0 podiums. ? fastest laps. | | Team: Ray Brady, Leitenberger, Henry Allen Chapman, Chapman Root | | Car: Kurtis 4000 (Offenhauser) | | Car: Kurtis 4000D (Offenhauser) | | Car: Silnes/Sherman (Offenhauser) | | Car: Russo/Nichels (Offenhauser) | | Car: Blough (Offenhauser) | | Car: Blough D (Offenhauser) | | Complete results needed. |
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1956
| | USAC National Championship | | Position: 31 (50 points) | 4 races. 0 wins. 0 pole positions. 0 podiums. ? fastest laps. | | Team: Hoover Motor Express | | Car: Templeton (Offenhauser) | | Complete results needed. |
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