Heavyweight · United States
Philadelphia Jack O'Brien 148-16-24, 5 NC 55 KO · 1896–1911
Photo: The original uploader was Richard Arthur Norton (1958- ) at English Wikipedia ., Public domain via Wikimedia Commons
Updated Oct 12, 2026 · Sources: Wikidata, English Wikipedia, Wikipedia (ru)
Philadelphia Jack O'Brien was a heavyweight boxer from United States, born Jan 17, 1878. Record 148-16-24, 5 NC with 55 knockouts over 1896–1911. Philadelphia Jack O'Brien last fought Sam Langford on Aug 15, 1911 and lost by TKO in round 5 of 10.
Also: فيلادلفيا جاك أوبراين · فيلادلفيا جاك اوبراين · フィラデルフィア・ジャック・オブライエン +2 more Philadelphia Jack O’Brien · Philadephia Jack O'Brien
Born Jan 17, 1878
Died Nov 12, 1942
Country 🇺🇸 United States
Stance Orthodox
Height 179 cm
Debut Dec 14, 1896
Career 1896–1911
Rounds boxed 731
KO share 37%
Born in Philadelphia, Pennsylvania
Titles World light-heavyweight title 1905
Confirmed bouts 23 of 193
Career record Record
148-16-24, 5 NC, 55 KOs · 1896–1911
Last result L
TKO 5/10 · Twentieth Century A.C., New York City, 🇺🇸
The record 193 bouts, 1896–1911, newest first. Records under each bout are both boxers going in. Wikidata: 100-6-16
Bouts by source: English Wikipedia · 193, Wikipedia (ru) · 1
L
TKO 5/10 · Twentieth Century A.C., New York City, 🇺🇸
O'Brien 148-15-24 · Langford 80-7-24
L
Harry Ramsey
6 · American A.C., Philadelphia, 🇺🇸
O'Brien 148-14-24 · Ramsey —
L
Ben Koch
6 · American A.C., Philadelphia, 🇺🇸
O'Brien 148-13-24 · Koch —
W
Mike Schreck
10 · Duquesne Garden, Pittsburgh, 🇺🇸
O'Brien 147-13-24 · Schreck —
L
6 · Duquesne Garden, Pittsburgh, 🇺🇸
O'Brien 147-12-24 · Kaufman —
L
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 147-11-24 · Kaufman —
W
Charley Stevenson
6 · West End A.C., Philadelphia, 🇺🇸
O'Brien 146-11-24 · Stevenson —
W
6 · City Auditorium, Denver, 🇺🇸
O'Brien 145-11-24 · Chiariglione 47-13-20
L
TKO 3/6 · National A.C., Philadelphia, 🇺🇸
O'Brien 145-10-24 · Ketchel 46-4-3
D
World heavyweight title at stake NWS 6 · National A.C., Philadelphia, 🇺🇸
O'Brien 145-10-23 · Johnson 48-5-8
L
10 · National A.C., New York City, 🇺🇸
O'Brien 145-9-23 · Ketchel 43-4-3
W
Fred Cooley
PTS 2/2 · West End A.C., Philadelphia, 🇺🇸
O'Brien 144-9-23 · Cooley —
W
George Cole
6 · West End A.C., Philadelphia, 🇺🇸
O'Brien 143-9-23 · Cole —
W
Tom Lenihan
TKO 4/6 · Ontario A.C., Philadelphia, 🇺🇸
O'Brien 142-9-23 · Lenihan —
W
Larry Temple
6 · West End A.C., Philadelphia, 🇺🇸
O'Brien 141-9-23 · Temple —
W
Jack Rush
KO 7 · Clarksburg, West Virginia, 🇺🇸
O'Brien 140-9-23 · Rush —
W
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 139-9-23 · Blackburn 82-6-18
W
Jack Bonner
6 · West End A.C., Philadelphia, 🇺🇸
O'Brien 138-9-23 · Bonner —
D
Bob Ward
PTS 10/10 · Charleston, West Virginia, 🇺🇸
O'Brien 138-9-22 · Ward —
W
Bill Heveron
KO 1/6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 137-9-22 · Heveron —
Show all 193 bouts L
For world heavyweight title PTS 20/20 · Naud Junction Pavilion, Los Angeles, 🇺🇸
O'Brien 137-8-22 · Burns 34-3-8
W
Abdul 'The Turk' Malgan
DQ 5/6 · Naud Junction Pavilion, Los Angeles, 🇺🇸
O'Brien 136-8-22 · Malgan —
D
For world heavyweight title PTS 20/20 · Naud Junction Pavilion, Los Angeles, 🇺🇸
O'Brien 136-8-21 · Burns 34-3-7
W
Jim Tremble
KO 9/10 · Naud Junction Pavilion, Los Angeles, 🇺🇸
O'Brien 134-8-21 · Tremble —
W
Fred Cooley
KO 3/10 · Naud Junction Pavilion, Los Angeles, 🇺🇸
O'Brien 134-8-21 · Cooley —
W
Ted Beecham
KO 2 · New Castle, Pennsylvania, 🇺🇸
O'Brien 133-8-21 · Beecham —
D
6 · Woodward's Pavilion, San Francisco, 🇺🇸
O'Brien 133-8-20 · Berger —
W
Won world light-heavyweight title RTD 13/20 · Woodward's Pavilion, San Francisco, 🇺🇸
O'Brien 132-8-20 · Fitzsimmons 68-9-16
W
KO 17/20 · Woodward's Pavilion, San Francisco, 🇺🇸
O'Brien 131-8-20 · Kaufman —
W
Bill Bates
DQ 6 · Fairbanks, Alaska
O'Brien 130-8-20 · Bates —
W
Bill Bates
PTS 10/10 · Dawson City, Yukon Territory, 🇨🇦
O'Brien 129-8-20 · Bates —
D
PTS 20/20 · Dawson City, Yukon Territory, 🇨🇦
O'Brien 129-8-19 · Sullivan —
L
Lost world middleweight title claim PTS 10/10 · Auditorium, Indianapolis, 🇺🇸
O'Brien 129-7-19 · Micheli —
W
Retained world middleweight title claim PTS 10/10 · 4th Regiment Armory, Baltimore, 🇺🇸
O'Brien 128-7-19 · Jackson 71-20-22
W
Retained world middleweight title claim DQ 2/15 · 4th Regiment Armory, Baltimore, 🇺🇸
O'Brien 127-7-19 · Jackson 71-19-22
W
John Willie
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 126-7-19 · Willie —
W
Morris Harris
6 · Washington S.C., Philadelphia, 🇺🇸
O'Brien 125-7-19 · Harris —
W
Larry Temple
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 124-7-19 · Temple —
W
Black Bill
6 · Manhattan A.C., Philadelphia, 🇺🇸
O'Brien 123-7-19 · Bill —
W
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 122-7-19 · Kid 26-9-7
W
John Willie
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 121-7-19 · Willie —
W
Jim Jeffords
KO 3/15 · Eureka A.C., Baltimore, 🇺🇸
O'Brien 120-7-19 · Jeffords —
W
6 · Panorama Building, Milwaukee, 🇺🇸
O'Brien 119-7-19 · Burns 27-1-4
W
KO 1/6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 118-7-19 · Butler —
W
Billy Stift
KO 2/15 · Germania Maennerchor Hall, Baltimore, 🇺🇸
O'Brien 117-7-19 · Stift —
W
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 116-7-19 · Micheli —
L
6 · Baker Bowl, Philadelphia, 🇺🇸
O'Brien 116-6-19 · Fitzsimmons 67-9-16
W
George Cole
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 115-6-19 · Cole —
D
6 · 2nd Regiment Armory, Philadelphia, 🇺🇸
O'Brien 115-6-18 · McCoy 68-7-9
W
Kid Carter
TKO 3 · West End A.C., Saint Louis, 🇺🇸
O'Brien 114-6-18 · Carter —
W
Retained world middleweight title claim KO 3/20 · West End A.C., Saint Louis, 🇺🇸
O'Brien 113-6-18 · Sullivan —
W
PTS 6/6 · Battery D Armory, Chicago, 🇺🇸
O'Brien 112-6-18 · Micheli —
W
Mike Schreck
PTS 15/15 · West End A.C., Saint Louis, 🇺🇸
O'Brien 111-6-18 · Schreck —
W
Charles Mack
TKO 3 · Watita Hall, Chicago, 🇺🇸
O'Brien 110-6-18 · Mack —
D
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 110-6-17 · Ryan 81-2-14
D
PTS 10/10 · Vineyard's Hall, Kansas City, 🇺🇸
O'Brien 110-6-16 · Micheli —
W
Jim Jeffords
6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 109-6-16 · Jeffords —
W
Won vacant world middleweight title PTS 15/15 · Criterion A.C., Boston, 🇺🇸
O'Brien 108-6-16 · Sullivan —
W
Diamond Dick Torpey
PTS 6/6 · Chicago A.A., Chicago, 🇺🇸
O'Brien 107-6-16 · Torpey —
W
Mike Schreck
PTS 6/6 · Chicago A.A., Chicago, 🇺🇸
O'Brien 106-6-16 · Schreck —
W
Jack Williams
KO 3/6 · National A.C., Philadelphia, 🇺🇸
O'Brien 105-6-16 · Williams —
W
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 104-6-16 · Sullivan —
W
Bill Heveron
KO 4/15 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 103-6-16 · Heveron —
W
Jack Mullen
RTD 8/10 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 102-6-16 · Mullen —
W
Charlie Haghey
KO 3/20 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 101-6-16 · Haghey —
W
Paddy Sheehan
6 · Bethlehem, Pennsylvania, 🇺🇸
O'Brien 100-6-16 · Sheehan —
W
Jim Jeffords
6 · Southern A.C., Philadelphia, 🇺🇸
O'Brien 99-6-16 · Jeffords —
W
Kid Carter
6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 98-6-16 · Carter —
W
Jack Bonner
10 · Mauch Chunk, Pennsylvania, 🇺🇸
O'Brien 97-6-16 · Bonner —
W
Jack Williams
6 · Southern A.C., Philadelphia, 🇺🇸
O'Brien 96-6-16 · Williams —
W
6 · National A.C., Philadelphia, 🇺🇸
O'Brien 95-6-16 · Byers 17-7-20
W
George Feeley
KO 3/6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 94-6-16 · Feeley —
L
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 94-5-16 · Hart 19-3-0
D
PTS 10/10 · Health & Physical Culture A.C., Boston, 🇺🇸
O'Brien 94-5-15 · Walcott 72-12-11
W
6 · Washington S.C., Philadelphia, 🇺🇸
O'Brien 93-5-15 · Choynski 58-16-6
W
Billy Payne
TKO 2/6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 92-5-15 · Payne —
W
Jim Jeffords
PTS 10/10 · Masonic Hall, Pittsburgh, 🇺🇸
O'Brien 91-5-15 · Jeffords —
W
Jack Butler
6 · Lancaster, Pennsylvania, 🇺🇸
O'Brien 90-5-15 · Butler —
W
Al Weinig
TKO 4/6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 89-5-15 · Weinig —
W
6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 88-5-15 · Grim —
W
Al Weinig
KO 12/20 · International A.C., Fort Erie, 🇨🇦
O'Brien 87-5-15 · Weinig —
W
Jimmy Watts
KO 4/6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 86-5-15 · Watts —
W
Charlie McKeever
6 · Washington S.C., Philadelphia, 🇺🇸
O'Brien 85-5-15 · McKeever —
W
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 84-5-15 · Hart 18-2-0
W
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 83-5-15 · Maher 6-8-2
W
Jim Jeffords
6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 82-5-15 · Jeffords —
W
6 · Ariel A.C., Philadelphia, 🇺🇸
O'Brien 81-5-15 · Maher 6-7-2
W
PTS 6/6 · America A.C., Chicago, 🇺🇸
O'Brien 80-5-15 · Choynski 56-15-6
W
Billy Stift
PTS 6/6 · Apollo Hall, Chicago, 🇺🇸
O'Brien 79-5-15 · Stift —
W
Jack Lewis
KO 1 · Mount Clemens, Michigan, 🇺🇸
O'Brien 78-5-15 · Lewis —
W
Jack Beauscholte
PTS 6/6 · America A.C., Chicago, 🇺🇸
O'Brien 76-5-15 · Beauscholte —
W
PTS 6/6 · America A.C., Chicago, 🇺🇸
O'Brien 76-5-15 · Driscoll 15-0-1
W
Yank Kenny
KO 3/6 · Globe Theater, Philadelphia, 🇺🇸
O'Brien 75-5-15 · Kenny —
NC
Jack Bonner
6 · Turn Hall, Paterson, 🇺🇸
O'Brien 75-5-15 · Bonner —
W
George Cole
6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 74-5-15 · Cole —
W
Al Neill
KO 3/6 · Wabash A.C., Chicago
O'Brien 73-5-15 · Neill —
W
Charlie McKeever
KO 1/6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 72-5-15 · McKeever —
W
Jack Bonner
6 · Golden Gate A.C., Philadelphia, 🇺🇸
O'Brien 71-5-15 · Bonner —
W
Jack Williams
3 · Central A.C., Philadelphia, 🇺🇸
O'Brien 69-5-15 · Williams —
W
Tom Lenihan
TKO 2/3 · Central A.C., Philadelphia, 🇺🇸
O'Brien 69-5-15 · Lenihan —
W
George Cole
TKO 4/6 · National A.C., Philadelphia, 🇺🇸
O'Brien 68-5-15 · Cole —
W
6 · Washington S.C., Philadelphia, 🇺🇸
O'Brien 67-5-15 · Jackson 53-11-14
W
6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 66-5-15 · Walcott 67-9-10
W
Charlie McKeever
6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 65-5-15 · McKeever —
W
Mahoney
TKO 3 · Bijou Theater, Reading, 🇺🇸
O'Brien 63-5-15 · Mahoney —
W
Jack McCann
KO 2/6 · Bijou Theater, Reading, 🇺🇸
O'Brien 63-5-15 · McCann —
W
Rufus Graham
6 · Broadway A.C., Philadelphia, 🇺🇸
O'Brien 62-5-15 · Graham —
W
Ed Denfass
TKO 5/6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 61-5-15 · Denfass —
W
Charlie McKeever
6 · Washington A.C., Philadelphia, 🇺🇸
O'Brien 60-5-15 · McKeever —
W
Andy Walsh
TKO 3/6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 59-5-15 · Walsh —
W
Yank Kenny
DQ 4/6 · The Circus, West Hartlepool, 🇬🇧
O'Brien 58-5-15 · Kenny —
W
Charlie McKeever
Retained English middleweight title DQ 3/15 · Leeds and County Athletic Club, Leeds, 🇬🇧
O'Brien 57-5-15 · McKeever —
W
J Kearny
KO 1/6 · Gymnasium, Charing Cross, 🇬🇧
O'Brien 55-5-15 · Kearny —
W
Pat McDonald
TKO 2/6 · Gymnasium, Charing Cross, 🇬🇧
O'Brien 55-5-15 · McDonald —
W
Yank Kenny
Retained English middleweight title TKO 4/15 · Adelphi Theatre, Liverpool, 🇬🇧
O'Brien 54-5-15 · Kenny —
W
DQ 7/10 · National Sporting Club, Covent Garden, 🇬🇧
O'Brien 53-5-15 · Craig —
W
Jack Scales
KO 1/20 · Liverpool Gymnastic Club, Liverpool, 🇬🇧
O'Brien 52-5-15 · Scales —
W
PTS 6/6 · America A.C., Chicago, 🇺🇸
O'Brien 51-5-15 · Choynski 55-14-6
W
Andrew Cock Robin
KO 3/10 · Leeds and County Athletic Club, Leeds, 🇬🇧
O'Brien 49-5-15 · Robin —
W
Harry Smith
KO 3/10 · Leeds and County Athletic Club, Leeds, 🇬🇧
O'Brien 49-5-15 · Smith —
W
Jasper White
KO 2 · Coronation Hall, Liverpool, 🇬🇧
O'Brien 47-5-15 · White —
W
Jack McDonald
KO 1 · Coronation Hall, Liverpool, 🇬🇧
O'Brien 47-5-15 · McDonald —
W
Mick Lynch
KO 3/12 · West Hartlepool Gymnasium, West Hartlepool, 🇬🇧
O'Brien 46-5-15 · Lynch —
W
Dido Plumb
Won English middleweight title KO 6/15 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 45-5-15 · Plumb —
W
Jack Scales
PTS 6/6 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 44-5-15 · Scales —
W
Harry Neumier
KO 6/20 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 43-5-15 · Neumier —
W
George Chrisp
KO 11/20 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 42-5-15 · Chrisp —
W
Lachie Thomson
KO 2/20 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 41-5-15 · Thomson —
W
Harry Smith
TKO 4/15 · Ginnetts Circus, Newcastle, 🇬🇧
O'Brien 40-5-15 · Smith —
W
Jimmy Handler
TKO 6/6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 39-5-15 · Handler —
NC
Billy Payne
6 · Star Theater, Philadelphia, 🇺🇸
O'Brien 39-5-15 · Payne —
W
Jimmy Handler
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 38-5-15 · Handler —
W
Tommy West
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 37-5-15 · West —
W
George Cole
DQ 10/20 · Trenton A.C., Trenton, 🇺🇸
O'Brien 36-5-15 · Cole —
W
Jack Bonner
6 · Penn Art Club, Philadelphia, 🇺🇸
O'Brien 35-5-15 · Bonner —
W
Andy Walsh
6 · Industrial Hall, Philadelphia, 🇺🇸
O'Brien 34-5-15 · Walsh —
D
Jim Adams
PTS 6/6 · Des Moines, Iowa, 🇺🇸
O'Brien 34-5-14 · Adams —
NC
Jim Adams
NC 5/25 · Baseball Park, Des Moines, 🇺🇸
O'Brien 34-5-14 · Adams —
W
Jack Lewis
KO 7 · Des Moines, Iowa, 🇺🇸
O'Brien 33-5-14 · Lewis —
W
Charley Bell
KO 2 · Iowa City, Iowa, 🇺🇸
O'Brien 32-5-14 · Bell —
W
Jack Mahoney
PTS 6/6 · Star Theatre, Chicago, 🇺🇸
O'Brien 31-5-14 · Mahoney —
W
Bob Long
PTS 6/6 · Chicago, Illinois, 🇺🇸
O'Brien 30-5-14 · Long —
L
KO 13/20 · Woodward's Pavilion, San Francisco, 🇺🇸
O'Brien 30-4-14 · Jackson 33-3-6
D
Al Neill
PTS 15/15 · Woodward's Pavilion, San Francisco, 🇺🇸
O'Brien 30-4-13 · Neill —
W
Tom Tracey
PTS 6/6 · Star Theatre, Chicago, 🇺🇸
O'Brien 29-4-13 · Tracey —
W
Billy Murray
KO 3 · Auditorium for fistic carnival, Dubuque, 🇺🇸
O'Brien 28-4-13 · Murray —
W
Tom McCune
KO 12 · Jack Leonard's Club, Clinton, 🇺🇸
O'Brien 27-4-13 · McCune —
W
Shorty Ahearn
PTS 6/6 · Dearborn A.C., Chicago, 🇺🇸
O'Brien 26-4-13 · Ahearn —
W
Walter Nolan
KO 4 · Star Theatre, Chicago, 🇺🇸
O'Brien 25-4-13 · Nolan —
W
Kid Baxter
PTS 6/6 · Star Theatre, Chicago, 🇺🇸
O'Brien 24-4-13 · Baxter —
W
Tony Drew
KO 7/20 · Trenton, New Jersey, 🇺🇸
O'Brien 23-4-13 · Drew —
W
George Cole
PTS 20/20 · Trenton, New Jersey, 🇺🇸
O'Brien 22-4-13 · Cole —
W
Dick Kelly
4 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 21-4-12 · Kelly —
D
Billy Payne
4 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 21-4-12 · Payne —
W
Billy Payne
8 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 20-4-12 · Payne —
D
Jack Collier
6 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 20-4-11 · Collier —
W
George Cole
6 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 19-4-11 · Cole —
D
Tom Cavanaugh
4 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 18-4-10 · Cavanaugh —
W
Fred Stricker
4 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 18-4-10 · Stricker —
W
Hugh McWinters
PTS 20/20 · Pelican A.C., Brooklyn, 🇺🇸
O'Brien 17-4-10 · McWinters —
D
Harry Warren
6 · Arena A.C., Philadelphia, 🇺🇸
O'Brien 17-4-9 · Warren —
W
Kid Carter
DQ 11/20 · Greenwood A.C., Brooklyn, 🇺🇸
O'Brien 16-4-9 · Carter —
W
Billy Payne
6 · Arena A.C., Philadelphia, 🇺🇸
O'Brien 15-4-9 · Payne —
W
Young Smyrna
6 · Arena, Philadelphia, 🇺🇸
O'Brien 14-4-9 · Smyrna —
W
Dick Kelly
PTS 4/4 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 13-4-9 · Kelly —
W
Billy Payne
6 · Arena, Philadelphia, 🇺🇸
O'Brien 12-4-9 · Payne —
D
Billy Payne
6 · Arena A.C., Philadelphia, 🇺🇸
O'Brien 12-4-8 · Payne —
W
Jack McCann
PTS 3/3 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 11-4-8 · McCann —
D
Wilmington Jack Daly
6 · Arena, Philadelphia, 🇺🇸
O'Brien 11-4-7 · Daly —
W
Young Smyrna
PTS 6/6 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 10-4-7 · Smyrna —
L
Izzy Strauss
6 · East Side A.C., Philadelphia, 🇺🇸
O'Brien 10-3-7 · Strauss —
W
Paddy Sheehan
6 · Maennerchor Hall, Reading, 🇺🇸
O'Brien 9-3-7 · Sheehan —
W
Barney Connors
PTS 8/8 · Baltimore, Maryland, 🇺🇸
O'Brien 8-3-7 · Connors —
W
Izzy Strauss
6 · Arena A.C., Philadelphia, 🇺🇸
O'Brien 7-3-7 · Strauss —
W
Joe Dougherty
KO 3 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 6-3-7 · Dougherty —
D
Martin Judge
PTS 6/6 · Library Hall, Reading, 🇺🇸
O'Brien 6-3-6 · Judge —
W
Jack Hanlon
PTS 6/6 · Reading, Pennsylvania, 🇺🇸
O'Brien 5-3-6 · Hanlon —
W
Martin Judge
PTS 6/6 · Reading, Pennsylvania, 🇺🇸
O'Brien 4-3-6 · Judge —
D
Paddy Sheehan
PTS 4/4 · Reading, Pennsylvania, 🇺🇸
O'Brien 4-3-5 · Sheehan —
D
Barney Connors
PTS 15/15 · Empire Club, Highlandtown, 🇺🇸
O'Brien 4-3-4 · Connors —
W
Charles Bull McCarthy
PTS 6/6 · Philadelphia, Pennsylvania, 🇺🇸
O'Brien 3-3-4 · McCarthy —
L
Charles Bull McCarthy
6 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 3-2-4 · McCarthy —
NC
Young Smyrna
4 · Harmoula Hall, Chester, 🇺🇸
O'Brien 3-2-4 · Smyrna —
L
Billy Payne
PTS 10/10 · Olympic A.C., Athens, 🇺🇸
O'Brien 3-1-4 · Payne —
L
Leslie Pearce
6 · Arena, Philadelphia, 🇺🇸
O'Brien 3-0-4 · Pearce —
D
Billy Payne
6 · Arena, Philadelphia, 🇺🇸
O'Brien 3-0-3 · Payne —
W
Dan McConnell
6 · Arena, Philadelphia, 🇺🇸
O'Brien 2-0-3 · McConnell —
W
Izzy Strauss
6 · Quaker City A.C., Philadelphia, 🇺🇸
O'Brien 1-0-3 · Strauss —
D
Martin Judge
PTS 6/6 · Tuxedo A.C., Philadelphia, 🇺🇸
O'Brien 1-0-2 · Judge —
NC
Bobby Dobbs
4 · Washita Hall, Conshohocken, 🇺🇸
O'Brien 1-0-2 · Dobbs —
D
Bobby Dobbs
PTS 4/4 · Chester, Pennsylvania, 🇺🇸
O'Brien 1-0-1 · Dobbs —
W
George Russell
PTS 6/6 · Nonpareil A.C., Philadelphia, 🇺🇸
O'Brien 0-0-1 · Russell —
D
Izzy Strauss
PTS 6/6 · Caledonian A.C., Philadelphia, 🇺🇸
O'Brien 0-0-0 · Strauss —
Ratings now Not in any current ranking.
World titles No world title reigns recorded.
Facts
What is Philadelphia Jack O'Brien's record? Philadelphia Jack O'Brien's professional record is 148-16-24, 5 NC with 55 knockouts.
Who did Philadelphia Jack O'Brien fight last? Philadelphia Jack O'Brien last fought Sam Langford on Aug 15, 1911 and lost by TKO in round 5 of 10. Sources Boxerbook ID 9772 · permanent link boxerbook.com/id/9772 . Wikidata (CC0), English Wikipedia (CC BY-SA), photo from Wikimedia Commons. Last fetched: 2026-10-12. Spot a mistake? Every bout page has a link to report it.
