Haiden Deegan left his mark in the 250 class. Dominating the 250 West Monster Energy Supercross Championship this season.⁣ ⁣ Watch DangerboyDeegan clinch the 250 West championship in St. Louis on Peacock and SMX Video Pass.⁣ ⁣ #SMX #SupercrossLIVE #Peacock #SMXVideoPass