Pierce O’Leary

“Big Bang”

Boxing

19-1-0RECORD

11WINS BY KO / TKO

8WINS BY DECISION

20PRO FIGHTS

Profile

Full name	Not added yet
Nickname	Big Bang
Date of birth	28 Feb 2000
Nationality	Irish
Birthplace	Not added yet
Based in	Not added yet
Weight classes	Super lightweight
Trainers	Not added yet
Height	173 cm (5′8″)
Reach	Not added yet
Stance	Orthodox
Years active	2019–2026
Status	Not added yet
Pro debut	11 Oct 2019
Last fight	Loss vs Mark Chamberlain, 1 Aug 2026

Details on this page were compiled from public information on 9 Oct 2026 (the record is as of that date). Is this you? Claim this profile to correct anything and add your photo and bio. Claim this profile

Fight history

20 professional fights. Newest first.

Result	Opponent	Method	Round	Time	Date
Loss	Mark Chamberlain	TKO	10	1:37	1 Aug 2026
Win	Maxi Hughes	TKO (corner retirement)	5	3:00	14 Mar 2026
Win	Braian Esequiel Ronner	KO	8	0:53	6 Dec 2025
Win	Liam Dillon	Decision (unanimous)	12		7 Jun 2025
Win	Jose Edgardo Perdomo	TKO	3	1:06	7 Dec 2024
Win	Darragh Foley	Decision (unanimous)	10		28 Jun 2024
Win	Hovhannes Martirosyan	KO	9	2:39	16 Mar 2024
Win	Kane Gardner	Decision (unanimous)	10		23 Sep 2023
Win	Alin Florin Ciorceri	TKO	1	2:39	27 May 2023
Win	Emmanuel Mungandjela	Decision (unanimous)	10		26 Nov 2022
Win	Robin Zamora	TKO	2	1:01	16 Jul 2022
Win	Nathan Augustine	KO	1	2:41	15 Apr 2022
Win	Siar Ozgul	TKO	7	1:14	29 Oct 2021
Win	Jan Marsalek	TKO	2	2:30	25 Jun 2021
Win	Irvin Magno	Decision (points)	6		19 Feb 2021
Win	Jacob Quinn	TKO	4	0:21	12 Aug 2020
Win	Liam Richards	Decision (points)	4		1 Feb 2020
Win	Alec Bazza	TKO	2	1:56	20 Dec 2019
Win	Chris Adaway	Decision (points)	4		16 Nov 2019
Win	Oscar Amador	Decision (points)	4		11 Oct 2019