Battling on both the QS and the CT, the Brazilian air phenom defeats Liam O'Brien in the Final at the Vans US Open.
The Oahu, Hawaii, native may be known for his Pipeline charging, but Mamiya showed his versatility to knock out an event favorite.
Sitting on No. 2 on the QS, the surfer from France looks to earn his first victory at the Vans US Open in Huntington Beach.
A big day of action as the men's Round 3 wraps up and the first-ever women's QS 10,000 kicks off in Huntington Beach.
Conner Coffin, Caroline Marks, Kanoa Igarashi, Courtney Conlogue, and Griffin Colapinto lead the pack at the Vans US Open of Surfing.
The newly turned 21-year-old came out firing in his Round 3 affair with an excellent 8.33.
The Australian up-and-comer takes down World No. 1 in the final seconds as Caio Ibelli goes excellent.
Local CT and QS talent top the leaderboards in Rounds 2 and 3 in Huntington Beach.
The Californian earns a 15.17 (8.50 + 6.67), the highest wave score and combined heat total of the day at the Vans US Open of Surfing.