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Kill The Body

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Jack Mahoney vs Philadelphia Jack O'Brien — record, stats and common opponents compared

Jack Mahoney

🇺🇸HEAVYWEIGHT

Philadelphia Jack O'Brien

Jack Mahoney (0-1-2 across 4 tracked bouts) and Philadelphia Jack O'Brien (147-16-24) 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.

Mahoney

Tracked record

0–1–2

counted from 4 bouts Kill The Body has ingested

O'Brien

147

Wins55 KO · 37%

16

Losses

24

Draws188 tracked bouts

Heads up: at least one of these records is a tracked record — the wins and losses Kill The Body has ingested so far, not an independently verified career total. Treat the comparison as a read on the bouts we hold, not a settled ledger.

Head to Head

O'Brien leads 1–0

Jack Mahoney and Philadelphia Jack O'Brien have met 1 time; O'Brien leads 1–0.

Jack Mahoney and Philadelphia Jack O'Brien have met 1 time; O'Brien leads 1–0.
Met1900May 25Series
Jack MahoneyFighter ALLost0–1W–L
Philadelphia Jack O'BrienFighter BWWon1–0W–L
ResultPTS1Meeting

The Numbers

Mahoney 1 · O'Brien 4 of 5 measurable rows
MahoneyO'Brien
Record†
0-1-2147-16-24 (edge)
Win %0–100%
33.3%
85% (edge)
Wins by knockoutmax 55
0
55 (edge)
KO ratenot comparable
—37.41%
Stoppage rate (tracked wins)‡not comparable
—37%
Times stopped‡max 3
0 (edge)
3
Title reignslevelmax 0
0
0
Bouts per year§max 12.8
2.8
12.8 (edge)
Bouts trackedcoveragemax 188
4
188

† One or both records are tracked, not career-verified. · ‡ Counted from bouts Kill The Body has ingested, not a career total. · § Across each fighter's tracked career span. · Bars are scaled per row — percentages on 0–100, counts against the larger of the two. Every figure is also printed as text.

Tale of the Tape

Agenot held
Jack Mahoney: No date of birth
Philadelphia Jack O'Brien: Died aged 64
Stance
Jack Mahoney: Not recorded
Philadelphia Jack O'Brien: Orthodox

Jack Mahoney left, Philadelphia Jack O'Brien right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Jack Mahoney0 wins · from 4 tracked bouts

Jack Mahoney: no tracked wins in the 4 bouts Kill The Body has ingested.

No tracked wins for Mahoney yet.

Philadelphia Jack O'Brien147 wins · from 188 tracked bouts

Philadelphia Jack O'Brien: 147 tracked wins — 55 by KO/TKO (37%), 29 on the cards (20%) and 63 by another method or unrecorded (43%). Counted from 188 bouts Kill The Body has ingested.

55 by KO/TKO 37%29 on the cards 20%63 by another method or unrecorded 43%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Jack Mahoney 4, Philadelphia Jack O'Brien 188 — 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

Oldest left · newest right

Jack Mahoney last boxed on Dec 27, 1900 — 45,962 days ago. Mahoney had a no contest in the most recent tracked bout with Mysterious Billy Smith.DDLNC

Smith Jul 1899Smith Mar 1900O'Brien May 1900Smith Dec 19002.8 tracked bouts per year

Philadelphia Jack O'Brien has lost three straight, after one straight win. O'Brien last boxed on Aug 15, 1911.LWLLL

Kaufman Apr 1910Schreck May 1910Koch Jun 1910Ramsey Nov 1910Langford Aug 191112.8 tracked bouts per year

Common Questions

With the rows behind them
Have Jack Mahoney and Philadelphia Jack O'Brien ever fought each other?
Yes. Jack Mahoney and Philadelphia Jack O'Brien met once on May 25, 1900, and Philadelphia Jack O'Brien won by PTS.
The meeting

LMay 25, 1900 · O'Brien · PTS

Head to Head ↓
Who has the better record, Mahoney or O'Brien?
Jack Mahoney is 0-1-2 across the 4 bouts Kill The Body has tracked and Philadelphia Jack O'Brien is 147-16-24. Philadelphia Jack O'Brien has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Records · win %

Mahoney0–1–233.3%

O'Brien147–16–2485%

The Numbers ↓
Who has more knockouts, Mahoney or O'Brien?
Jack Mahoney has 0 knockout wins and Philadelphia Jack O'Brien has 55. Philadelphia Jack O'Brien has more.
Knockout wins · KO rate

Mahoney0

O'Brien5537.4%

The Numbers ↓
Do Mahoney and O'Brien have any common opponents?
Kill The Body's bout data shows no opponents that both Jack Mahoney and Philadelphia Jack O'Brien have faced.
How much fight data does Kill The Body have on Mahoney and O'Brien?
This comparison is drawn from 4 bouts tracked for Jack Mahoney and 188 bouts tracked for Philadelphia Jack O'Brien. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Mahoney4bouts

O'Brien188bouts

How They Win ↓

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