At the lightest weights, we'll see a Who's Number One clash between the top-ranked 106-pounder, Christian Castillo, and the top-ranked 113-pounder, Anthony Knox. After his silver medal performance at the U17 World Championships, Castillo has decided to take a match up at 113 lbs against Fargo and Super 32 champ Knox.

Since his Fargo finals run and Super 32 podium finishes in 2021, Christian Castillo has caught fire. The man with the best mullet in wrestling ran the 48 kg gauntlet at the U17 World Team Trials and then followed that up with a run to the World finals. Castillo's results in Rome were impressive, but his manor of victory had wrestling fans' jaws on the floor. In the quarterfinals, Castillo gave up a lead late and had a restart with only 5 seconds remaining. He jumped over his Iranian opponent in dramatic fashion to secure one of the most electric wins of USA's team title performance.

Christian Castillo's U17 World quarterfinal scoring highlight

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Anthony Knox is no stranger to Who's Number One. A year ago, he defeated U17 World champ Luke Lilledahl. Since that time, he won titles at Super 32 and the New Jersey State Championships. In July, he moved up to 120 lbs to test the waters in a loaded Fargo bracket where he ultimately finished second to Marcus Blaze. Now he's heading back to 113 lbs.

Anthony Knox's Who's Number One victory against Luke Lilledahl

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Knox and Castillo are two of the most intriguing prospects in the class of 2025, and now they'll meet in a #1 vs #1 matchup on September 9 in Ann Arbor, Michigan.

Previous Who's Number One Match Announcements: 120 lbs | 126 lbs | 132 lbs | 138 lbs | 145 lbs | 152 lbs | 160 lbs | 170 lbs | 182 lbs