Deegan To Make 450 Debut At FIM WSX

Ryan Nitzen | October 25, 2025

Haiden Deegan is set to make his 450cc racing debut at round one of the FIM World Supercross Championship (WSX) in Buenos Aires City, Argentina on November 8. Deegan will race two rounds (Argentina and Australia) aboard the Monster Energy Star Racing Yamaha YZ450F as he’ll be a wild card entry in the SX1 division. Deegan was already slated to race these two rounds of WSX but originally in the SX2 (250cc) class. This announcement means he’ll line up against heavy favorites like Eli Tomac, Cooper Webb, Ken Roczen, Jason Anderson and Justin Cooper for the very first time.

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Haiden Deegan is set to make his 450cc debut at the first round of World Supercross in Argentina. 

“I’m stoked to get out there and experience World Supercross on the 450,” said Deegan. “It’s a big step, but I’m really just looking forward to having some fun and meeting fans from around the world.”

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For the first time Deegan will line up against Roczen, Tomac, Anderson, and other 450 favorites. 

“Haiden’s 450 debut is one of the most talked-about storylines in supercross,” said Tom Burwell, World Supercross CEO. “He’s got that rare mix of talent, attitude, and star power that transcends the sport. Having him make this step with World Supercross is massive for fans everywhere and a huge statement for the championship – this is a moment fans won’t forget.”

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The WSX series kicks off with the first of five rounds in Argentina on November 8, 2025. 

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