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MMA Island

IBO Super Lightweight Championship

QUEENSBERR…

Championship

IBO Super Lightweight Championship

Queensberry Promotions · IBO

Regular champion Mark Chamberlain 0 defenses

Last contested

O'Leary vs Chamberlain August 1, 2026

Pierce O'Leary vs Mark Chamberlain

Title lineage

Won Regular title

Mark Chamberlain Pierce O'Leary Winner

0 defenses 3 days Longest reign Current

August 1, 2026 · TKO