| 1960 | Finished second to brother Bobby at Pike's Peak Hillclimb |
| 1964 | Made Indy car debut at Milwaukee and won Pikes Peak Hillclimb |
| 1965 | Finished ninth in first Indy 500 and won Pikes Peak Hillclimb |
| 1967 | Finished second at Indy 500 and named USAC Rookie of the Year |
| 1968 | Won five races in a row and grabbed five poles |
| 1970 | Won first Indy 500 and nine other races; named Driver of the Year |
| 1971 | Indy 500 win |
| 1977 | Won Indy car races at Pocono, Milwaukee, and Phoenix |
| 1978 | Took "Indy Car Triple Crown" with wins at Indy 500, Pocono, and Ontario; named Driver of the Year |
| 1987 | Fourth Indy 500 win |
| 1991 | Inducted into the Motorsports Hall of Fame of America |
| 1998 | Inducted into International Motorsports Hall of Fame |
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