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The 2019 AMA Supercross Championship season is the 47th AMA Supercross National Championship season, the premier supercross series in USA. Jason Anderson (motorcyclist) goes into the season as the defending champion in the 450 class, after taking his first 450 supercross title in 2018. This was Anderson's first ever AMA supercross title. In the 250 West class Aaron Plessinger is the defending champion after taking his maiden title last season. In the 250 East class Zach Osborne is the defending champion after taking his maiden title last season.

Riders Championship
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Riders Championship
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