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[SITUATION] · [ACTIVE]

3 clusters · 18 sources · 5 days · First seen 10 days ago · Last updated 6 days ago

Categories: SPORTS

O'Leary loses IBO super‑lightweight title to Chamberlain

Entities: 3Arena · Pierce O'Leary · Mark Chamberlain · DAZN · International Boxing Organization (IBO)

Overview

The IBO super‑lightweight world title bout at Dublin’s 3Arena on 1 August 2026, originally billed as Pierce O’Leary’s defense against Mark Chamberlain, ended with Chamberlain winning by a tenth‑round stoppage. After an early knock‑down spree that saw O’Leary down twice, the Irish champion rallied to drop Chamberlain in round 7, but Chamberlain recovered, regained control and forced a referee halt at 1:37 of round 10. The result gave Chamberlain an 18‑1‑1 record with 13 stoppages and handed O’Leary his first professional loss, moving his record to 19‑1. The event, streamed live on DAZN and attended by roughly 8,000 fans, also featured a vacant WBA continental super‑welterweight title fight between Ben Fail and Craig O’Brien and several Irish‑focused match‑ups. Former world champion Steve Collins praised the night’s atmosphere and its significance for Irish boxing despite the upset.

Claims

What the coverage asserts, and how well corroborated each claim is across sources.

[● 4 SOURCES] Mark Chamberlain defeated Pierce O'Leary by stoppage in the 10th round. (All articles)
[● 4 SOURCES] The bout took place at Dublin's 3Arena. (All articles)
[● 4 SOURCES] Mark Chamberlain won the IBO junior welterweight title. (All articles)
[● 4 SOURCES] Chamberlain knocked O'Leary down twice in the first three rounds. (All articles)
[● 4 SOURCES] O'Leary knocked Chamberlain down in the seventh round. (All articles)
[○ 1 SOURCE] The referee stopped the fight at 1:37 of round 10. (Article ef86a160-2d0c-4f94-9a12-5f4fe3cff30b)
[○ 1 SOURCE] Chamberlain's record improved to 18 wins, 1 loss, 1 draw with 13 stoppages. (Article efd9a397-eaed-49d7-abd9-2fdfa1c51f0e)
[○ 1 SOURCE] O'Leary's record fell to 19‑1 after his first professional loss. (Article efd9a397-eaed-49d7-abd9-2fdfa1c51f0e)

Timeline

6 days ago

[SPORTS] 10 sources
Mark Chamberlain captures IBO junior welterweight title in Dublin
Mark Chamberlain stopped Pierce O'Leary in round 10 at Dublin’s 3Arena, claiming the IBO junior welterweight title; Chamberlain improves to 18‑1‑1, O'Leary records his first loss.
8 days ago

[SPORTS] 8 sources
Pierce O'Leary Defends IBO Super‑Lightweight Title Against Mark Chamberlain in Dublin
Pierce O'Leary defended his IBO super‑lightweight title against Mark Chamberlain at Dublin’s 3Arena on Aug 1, 2026, after the bout was rescheduled due to Chamberlain’s chest infection; the fight aired on DAZN.
10 days ago

[SPORTS] 3 sources
Pierce O'Leary Defends IBO Super-Lightweight Title at Dublin's 3Arena
Pierce O'Leary will defend his IBO super‑lightweight title against Mark Chamberlain on 1 Aug 2026 at Dublin’s 3Arena, aiming to follow Katie Taylor’s legacy.

Sources

3kingsboxing.com · archyworldys.com · bigfightweekend.com · boxingnews.com · boxingnews24.com · boxingnewsonline.net · extra.ie · ilcorrierino.com · irish-boxing.com · irishmirror.ie · kickboxing.ca · miningconnections.com · news.co.za · sporf.com · taxand.com · the42.ie · worldinsport.com · wqxr.org

This summary has been updated 2 times: see revision history