Live results: Mark Chamberlain KOs Pierce O’Leary to claim title – Video

Pierce O'Leary defends his IBO super lightweight title against Mark Chamberlain in Dublin

Pierce O’Leary defends his IBO super lightweight title against Mark Chamberlain tonight (Saturday, August 1) live from 3Arena in Dublin.

  • O’Leary (19-0, 11 KOs) of Ireland claimed the vacant belt with a fifth-round stoppage victory over Maxi Hughes in March on the Dickens vs Cacace undercard.
  • Chamberlain (17-1-1, 12 KOs) of the UK was last in action last August, when he fought Jack Rafferty to a majority draw.

O’Leary and Chamberlain were originally scheduled to fight in March, but Chamberlain withdrew due to illness two weeks before the event, and Hughes stepped in as a replacement.

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The O’Leary vs Chamberlain undercard includes:

  • Royston Barney-Smith (16-0, 8 KOs) vs Reece Bellotti (20-7, 15 KOs) for the vacant IBO Intercontinental super featherweight title.
  • A super lightweight matchup between Gary Cully (19-2, 10 KOs) and Lee Reeves (16-1, 11 KOs).
  • Also at super lightweight, Steven Cairns (14-0, 9 KOs) takes on Senan Kelly (12-1, 2 KOs).
  • A super welterweight bout between Ben Fail (11-0, 6 KOs) and Craig O’Brien (15-4, 2 KOs).

O’Leary vs Chamberlain results

Main card

  • Mark Chamberlain def. Pierce O’Leary by KO (R10, 1:37) | Watch video
  • Royston Barney-Smith def. Reece Bellotti by unanimous decision (98-92, 100-90, 99-91)
  • Adam Olaniyan def. Deepak Pathak by TKO (R2, 1:03)
  • Steven Cairns def. Senan Kelly by TKO (R5, 0:59)
  • Ben Fail def. Craig O’Brien by KO (R5, 2:59)

Prelims

  • Bobbi Flood def. Tariq Davis by TKO (R4, 2:27)
  • Sami Hamed def. Bela Istvan Orban by points (40-34)
  • John Joe Carrigan def. Sean Murray by TKO (R3, 1:31)
  • Gary Cully def. Lee Reeves by KO (R10, 0:53)
  • Sean McComb def. Miguel Cesario Antin by points (60-54)
  • Machlan Arthur def. Ryan Frost by TKO (R4, 1:05)

O'Leary vs Chamberlain live blog

Mark Chamberlain KOs Pierce O'Leary to claim IBO super lightweight title

Mark Chamberlain (18-1-1, 13 KOs) defeats Pierce O’Leary (19-1, 11 KOs) by 10th-round knockout to claim O’Leary’s IBO super lightweight title. The stoppage came at 1:37 of the round.

The referee waved off the fight after Chamberlain dominated and dropped O’Leary with a barrage of punches.

Chamberlain also scored knockdowns in the second and third rounds, and suffered a knockdown himself in the seventh round.

Mark Chamberlain poses with his IBO championship belt after his victory over Pierce O'Leary
Mark Chamberlain poses with his IBO championship belt after his victory over Pierce O'Leary at 3Arena in Dublin, Ireland, on August 1, 2026. Photo by Queensberry

Royston Barney-Smith defeats Reece Bellotti by decision

Royston Barney-Smith (17-0, 8 KOs) defeats Reece Bellotti (20-8, 15 KOs) by unanimous decision. The judges scored the fight 98-92, 100-90, 99-91. With the win, Barney-Smith captures the vacant IBO Intercontinental super featherweight title.

Royston Barney-Smith celebrates his victory over Reece Bellotti
Royston Barney-Smith celebrates his victory over Reece Bellotti at 3Arena in Dublin, Ireland, on August 1, 2026. Photo by Queensberry

Adam Olaniyan stops Deepak Pathak in second round

Adam Olaniyan (3-0, 3 KOs) defeats Deepak Pathak (1-6, 1 KO) by second-round TKO in a heavyweight bout.

Adam Olaniyan celebrates his victory over Deepak Pathak
Adam Olaniyan celebrates his victory over Deepak Pathak at 3Arena in Dublin, Ireland, on August 1, 2026. Photo by Queensberry

Steven Cairns stops Senan Kelly in fifth round

Steven Cairns (15-0, 10 KOs) defeats Senan Kelly (12-2, 2 KOs) by fifth-round TKO in a super lightweight bout.

Steven Cairns celebrates his victory over Senan Kelly
Steven Cairns celebrates his victory over Senan Kelly at 3Arena in Dublin, Ireland, on August 1, 2026. Photo by Queensberry

Ben Fail KOs Craig O'Brien in fifth round

In the main card opener, Ben Fail (12-0, 7 KOs) defeats Craig O’Brien (15-5, 2 KOs) by fifth-round knockout in a super welterweight bout. British southpaw Fail sent his opponent to the canvas with a straight left.

Ben Fail celebrates his victory over Craig O'Brien
Ben Fail celebrates his victory over Craig O'Brien at 3Arena in Dublin, Ireland, on August 1, 2026. Photo by Queensberry

Free Prelims

The blog feed with live results will cover the main card. You can watch the free prelims below, with results added as the stream ends.

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Parviz Iskenderov
Parviz Iskenderov is a former Muay Thai fighter who provides in-depth coverage of the latest news, events, results, and more.

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