The IBO World Super Lightweight Championship fight is set between Mark Chamberlain and Pierce O’Leary and will take place in 3Arena. O'Leary is defending his championship while he tries to maintain his undefeated record. On the other hand, Chamberlain seeks to bounce back from his losses to clinch his world title. So, this fight is expected to be exciting. Here are the fight details, including the fight card, stats, bios, prediction, and our pick.
|
Details |
Information |
|
Main Event |
O'Leary vs. Chamberlain |
|
Title on Line |
IBO World Super Lightweight Championship |
|
Date |
01 August 2026, Saturday |
|
Time |
02:00 PM ET | 11:00 AM PT | 11:30 PM IST |
|
Venue |
3Arena |
|
Location |
Dublin, Ireland |
|
Fighters |
Division |
Title |
|
Pierce O'Leary vs. Mark Chamberlain |
Super Lightweight |
IBO World Super Lightweight Title |
|
Royston Barney Smith vs. Reece Bellotti |
Super Featherweight |
IBO Inter Continental Super Featherweight Title |
|
Gary Cully vs. Lee Reeves |
Super Lightweight |
- |
|
Steven Cairns vs. Senan Kelly |
Super Lightweight |
- |
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|
Details |
Pierce O'Leary |
Mark Chamberlain |
|
Nationality |
Irish |
British |
|
Age |
26 |
27 |
|
Height |
5’8” |
5' 9" |
|
Reach |
68.1" |
N/A |
|
Total Fights |
19 |
19 |
|
Record |
19 – 0 – 0 (11 KOs) |
17 – 1 – 1 (12 KOs) |
Pierce O'Leary is a professional, undefeated Irish boxer who is the current holder of the IBO super-lightweight belt. As a nine-time Irish amateur champion, O'Leary became a professional boxer in 2019. Then, he rapidly became one of Ireland's most promising talents. In 2022, O'Leary won the WBC International super-lightweight title and defended it four times. Later, he won the European super-lightweight belt in 2025 after defeating Liam Dillon. In March 2026, he won the vacant IBO super-lightweight belt by knocking out Maxi Hughes through corner retirement in round five. O'Leary is known for his boxing skills and is going into his upcoming match against Mark Chamberlain.
Mark Chamberlain is a professional boxer from England, known for his aggression and knock-out punches. Chamberlain became a professional boxer after winning the English National Amateur Elite Lightweight Championship in 2018. In 2022, he won the IBF European lightweight championship. Later won the WBA Intercontinental and WBC Silver lightweight championships through stunning knockouts in 2024. But then his unbeaten record was interrupted in 2024 after losing his match to Josh Padley via a unanimous decision. Then, in 2025, Chamberlain beat Miguel Angel Scaringi and drew with British and Commonwealth champion Jack Rafferty.
O'Leary enters this fight as the favorite to win. He aims to maintain his undefeated streak with his experience as a champion fighter. His home support will boost him. O'Leary has always proven himself against strong competitors with consistent knockout punches. Chamberlain has a southpaw fighting style with more power to knock out an opponent; he can also pose the same trouble. But Chamberlain has failed to perform well in his last three fights. Chamberlain definitely have the potential to change the game in one punch. However, he does not maintain the consistency like O'Leary.
Pick: Pierce O'Leary by Unanimous decision (UD).
