Mark Chamberlain (18-1-1) and Pierce O'Leary (19-1) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share no common opponents in Kill The Body's bout data.
Mark Chamberlain vs Pierce O'Leary — record, stats and common opponents compared
Head to Head
Mark Chamberlain leads 1–0- Mark Chamberlain wonChamberlain vs O'LearyAug 1, 2026 · TKO · R10
The Numbers
- 18-1-1
- Record
- 19-1 (edge)
- 92.5%
- Win %
- 95% (edge)
- 13 (edge)
- Wins by knockout
- 11
- 72.22% (edge)
- KO rate
- 57.89%
- 72% (edge)
- Stoppage rate (tracked wins)
- 58%
- 0 (edge)
- Times stopped
- 1
- 0
- Title reigns
- 0
- 2.6
- Bouts per year
- 2.9 (edge)
- 20
- Bouts tracked
- 20
Counted from bouts Kill The Body has ingested, not a career total.
Counted from bouts Kill The Body has ingested, not a career total.
Across each fighter's tracked career span.
Tale of the Tape
- —
- Height
- 5′8″ (173 cm)
- 27
- Age
- 26
- Southpaw
- Stance
- Orthodox
- United Kingdom
- Nationality
- Irish
How They Win
Tracked bouts onlyMark Chamberlain · 18 wins
KO/TKO
13
Decision
5
Other
0
Pierce O'Leary · 19 wins
KO/TKO
11
Decision
8
Other
0
Counted from the bouts Kill The Body has ingested for each fighter (20 and 20 respectively), not from a career-complete method table.
Common Opponents
No opponents in common across the bouts Kill The Body has tracked for these two.
Current Form
Mark Chamberlain
WDWLW
W1 streak · last fought Aug 1, 2026
Pierce O'Leary
LWWWW
L1 streak · last fought Aug 1, 2026
Common Questions
- Have Mark Chamberlain and Pierce O'Leary ever fought each other?
- Yes. Mark Chamberlain and Pierce O'Leary met once on August 1, 2026, and Mark Chamberlain won by TKO in round 10.
- Who has the better record, Mark Chamberlain or Pierce O'Leary?
- Mark Chamberlain is 18-1-1 and Pierce O'Leary is 19-1. Pierce O'Leary has the higher win percentage.
- Who has more knockouts, Mark Chamberlain or Pierce O'Leary?
- Mark Chamberlain has 13 knockout wins and Pierce O'Leary has 11. Mark Chamberlain has more.
- Do Mark Chamberlain and Pierce O'Leary have any common opponents?
- Kill The Body's bout data shows no opponents that both Mark Chamberlain and Pierce O'Leary have faced.
- How much fight data does Kill The Body have on Mark Chamberlain and Pierce O'Leary?
- This comparison is drawn from 20 bouts tracked for Mark Chamberlain and 20 bouts tracked for Pierce O'Leary. Method and activity splits reflect those bouts only.