# Mark Chamberlain Stuns Pierce O'Leary in Thriller to Claim IBO World Super Lightweight Title

**URL:** <https://forum.saddoboxing.com/t/mark-chamberlain-stuns-pierce-oleary-in-thriller-to-claim-ibo-world-super-lightweight-title/113740>\
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**Created:** [August 2, 2026, 12:48am UTC](https://forum.saddoboxing.com/t/mark-chamberlain-stuns-pierce-oleary-in-thriller-to-claim-ibo-world-super-lightweight-title/113740 "2026-08-02T00:48:38Z")\
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**Author:** ![Saddo](https://forum.saddoboxing.com/user_avatar/forum.saddoboxing.com/saddo/32/5603_2.png) [@Saddo](https://forum.saddoboxing.com/u/Saddo)\
**Post date:** [August 2, 2026, 12:48am UTC](https://forum.saddoboxing.com/t/mark-chamberlain-stuns-pierce-oleary-in-thriller-to-claim-ibo-world-super-lightweight-title/113740/1 "2026-08-02T00:48:38Z")

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Originally published at: [Mark Chamberlain Stuns Pierce O'Leary in Thriller to Claim IBO World Super Lightweight Title](https://www.saddoboxing.com/104542-mark-chamberlain-stuns-pierce-oleary-in-thriller-to-claim-ibo-world-super-lightweight-title.html)  
   
Mark Chamberlain stopped Pierce O’Leary in a dramatic tenth-round thriller to win the IBO World Super Lightweight title, while Royston Barney-Smith, Gary Cully and Steven Cairns all impressed on the Dublin card.