| 1998� | Rode for Team Yamaha. |
| �� | 250cc AMA National Motocross Champion - Had five overall wins - Became the first rider in history to win an AMA Motocross Championship with a four-stroke motorcycle (Yamaha 400 YZF). |
| �� | 7th, 250cc AMA Supercross Series - Had four podium finishes during the season. |
| 1997� | Rode for TeamYamaha. |
| �� | 15th, 250cc AMA Motocross Series. |
| �� | 7th, 250cc AMA Supercross Series - Won three rounds at Los Angeles, Seattle and Las Vegas. |
| 1996� | Rode for TeamYamaha. |
| �� | 11th, 250cc AMA Motocross Series - Had four top-five finishes during the season including a third place overall in Southwick, Mass. |
| �� | 18th, 250cc AMA Supercross Series. |
| 1995� | Rode for Team Honda. |
| �� | 15th, 250cc AMA Motocross Series - Won his first 250cc AMA Motocross National at Mt.Morris, Pennsylvania - Ended his season at the Budds Creek event after a crash where he broke his back. |
| �� | 5th, 250cc AMA Supercross Series - Won his first 250cc AMA Supercross at Irving, Texas. |
| 1994� | 125cc AMA National Motocross Champion - Won three events at Mt. Morris(PA), Southwick(MA) and Binghampton(NY). |
| �� | 125cc AMA National Motocross Champion - Won three events at Mt. Morris(PA), Southwick(MA) and |
| �� | 7th, 250cc AMA Supercross Series. |
| 1993� | 125cc AMA National Motocross Champion - Won three events at Southwick(MA), San Bernardino(CA) and Binghampton(NY). |
| �� | 125cc AMA East Supercross Champion. |
| 1992� | 4th, 125cc AMA Motocross Series. |
| �� | 3rd, 125cc AMA East Supercross Series. |
| 1991� | 7th, 125cc AMA Motocross Series - Won his first 125cc AMA Motocross National at Sacramento, California. |
| �� | 3rd, 125cc AMA East Supercross Series. |