| 1998� | Rode for Team Yamaha-Chaparral. |
| �� | 14th, 250cc AMA Motocross Series. Won the Sacramento (CA) round. Injuries forced his withdrawal after 3 events. |
| �� | 250cc AMA Supercross Champion - Won seven rounds. |
| 1997� | Rode for Team Suzuki of Troy. |
| �� | 3rd, 250cc AMA National Motocross Series. Had five overall podium finishes. |
| �� | 2nd, 250cc AMA Supercross Series. Won the Minneapolis and St Louis events. |
| 1996� | Rode for Team Honda US. |
| �� | Named AMA/Speedvision Pro Athlete of the Year. |
| �� | Won both of his races at the Motocross Des Nations leading the US team to victory. |
| �� | 2nd, 250cc AMA Motocross Series. Won seven events. |
| �� | 250cc AMA Supercross Champion. Broke the AMA Supercross record for number of wins in a season by winning 14 out of 15 events. |
| 1995� | Rode for Team Honda US. |
| �� | 250cc World Supercross Champion. |
| �� | 250cc AMA National Motocross Champion. |
| �� | 250cc AMA Supercross Champion. |
| 1994� | Rode for Team Honda US. |
| �� | 250cc World Supercross Champion. |
| �� | 250cc AMA Supercross Champion - Won 9 out of 15 events. |
| �� | 3rd, 250cc AMA Motocross Series. |
| 1993� | Rode for Team Honda US. |
| �� | Selected in the US team of the Motocross Des Nations. |
| �� | 3rd, 125cc AMA Motocross Series. |
| �� | 250cc AMA Supercross Champion. |
| 1992� | 8th, 125cc AMA National Motocross Series. |
| �� | 125cc AMA West Supercross Champion. |
| �� | 16th, 250cc AMA Supercross Series. |
| 1991� | 5th, 125cc AMA National Motocross Series. |
| �� | 125cc AMA West Supercross Champion. |
| 1989� | Turned pro. |