LIGHT WELTERWEIGHT division
PIERCE O'LEARY
ActiveBorn 2000-02-28 (aged 26)· IRE
Residence: DUBLIN· Stance: orthodox· aka BIG BANG
Debut: 2019-10-11· Career: 2019–2026 (8 years)
Wins
19
Losses
1
Draws
0
NC
0
Rated Fights
20
Head-to-Head Comparison
Compare PIERCE O'LEARY's career against any other fighter on record — records, ratings, common opponents, and any direct bouts.
Title Reigns — 3
2026-03-14 → 2026-08-01 · 4m 18d · 0 defences
Lost to MARK CHAMBERLAIN · TKO
2025-06-07 → 2026-06-06 · 11m 30d · 0 defences
Lost to BIANCAMARIA TESSARI · Wu
2022-11-26 → present · 3y 10m · 4 defences
Still reigning
Complete Record — 20 Bouts
| Date | Result | Opponent | Rds | Div. | Rate | |
|---|---|---|---|---|---|---|
| 01 AUG 2026 | LOSS | MARK CHAMBERLAIN | 10 | LIGHT WELTERWEIGHT | 2105 | TITLE |
| 14 MAR 2026 | TKO | MAXI HUGHES | 5 | LIGHT WELTERWEIGHT | 2210 | TITLE |
| 06 DEC 2025 | KO | BRAIAN ESEQUIEL RONNER | 8 | LIGHT WELTERWEIGHT | 2138 | |
| 07 JUN 2025 | DEC | LIAM DILLON | 12 | LIGHT WELTERWEIGHT | 2120 | TITLE |
| 07 DEC 2024 | TKO | JOSE EDGARDO PERDOMO | 3 | LIGHT WELTERWEIGHT | 2148 | |
| 28 JUN 2024 | DEC | DARRAGH FOLEY | 10 | LIGHT WELTERWEIGHT | 2163 | TITLE |
| 16 MAR 2024 | KO | HOVHANNES MARTIROSYAN | 9 | LIGHT WELTERWEIGHT | 2156 | TITLE |
| 23 SEP 2023 | DEC | KANE GARDNER | 10 | LIGHT WELTERWEIGHT | 2104 | TITLE |
| 27 MAY 2023 | TKO | ALIN FLORIN CIORCERI | 1 | LIGHT WELTERWEIGHT | 2144 | TITLE |
| 26 NOV 2022 | DEC | EMMANUEL MUNGANDJELA | 10 | LIGHT WELTERWEIGHT | 2145 | TITLE |
| 16 JUL 2022 | TKO | ROBIN ZAMORA | 2 | LIGHT WELTERWEIGHT | 2105 | |
| 15 APR 2022 | KO | NATHAN AUGUSTINE | 1 | LIGHT WELTERWEIGHT | 2027 | |
| 29 OCT 2021 | TKO | SIAR OZGUL | 7 | LIGHT WELTERWEIGHT | 1963 | |
| 25 JUN 2021 | TKO | JAN MARSALEK | 2 | LIGHT WELTERWEIGHT | 1970 | |
| 19 FEB 2021 | DEC | IRVIN MAGNO | 6 | LIGHT WELTERWEIGHT | 1954 | |
| 12 AUG 2020 | TKO | JACOB QUINN | 4 | LIGHT WELTERWEIGHT | 1981 | |
| 01 FEB 2020 | DEC | LIAM RICHARDS | 4 | LIGHT WELTERWEIGHT | 1961 | |
| 20 DEC 2019 | TKO | ALEC BAZZA | 2 | LIGHT WELTERWEIGHT | 1944 | |
| 16 NOV 2019 | DEC | CHRIS ADAWAY | 4 | LIGHT WELTERWEIGHT | 1864 | |
| 11 OCT 2019 | DEC | OSCAR AMADOR | 4 | LIGHT WELTERWEIGHT | 1862 |
