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Mason Semmens, professional Motocross rider.
Championship Career Results
| Championship | Class. | Pos. |
|---|---|---|
| AMA Pro Motocross 2026 | 450MX | 24th* |
More championships coming soon.
Mason Semmens, professional Motocross rider.
| Championship | Class. | Pos. |
|---|---|---|
| AMA Pro Motocross 2026 | 450MX | 24th* |
More championships coming soon.