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Kill The Body

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

Jack Mullen

🇺🇸HEAVYWEIGHT

Philadelphia Jack O'Brien

Jack Mullen (0-2 across 2 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.

Mullen

Tracked record

0–2

counted from 2 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 Mullen and Philadelphia Jack O'Brien have met 1 time; O'Brien leads 1–0.

Jack Mullen and Philadelphia Jack O'Brien have met 1 time; O'Brien leads 1–0.
Met1903Oct 12Series
Jack MullenFighter ALLost0–1W–L
Philadelphia Jack O'BrienFighter BWWon1–0W–L
ResultRTDR81Meeting

The Numbers

Mullen 1 · O'Brien 4 of 5 measurable rows
MullenO'Brien
Record†
0-2147-16-24 (edge)
Win %0–100%
0%
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
1 (edge)
3
Title reignslevelmax 0
0
0
Bouts per year§max 12.8
0.2
12.8 (edge)
Bouts trackedcoveragemax 188
2
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 Mullen: No date of birth
Philadelphia Jack O'Brien: Died aged 64
Stance
Jack Mullen: Not recorded
Philadelphia Jack O'Brien: Orthodox

Jack Mullen 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 Mullen0 wins · from 2 tracked bouts

Jack Mullen: no tracked wins in the 2 bouts Kill The Body has ingested.

No tracked wins for Mullen 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 Mullen 2, 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 Mullen last boxed on Oct 12, 1903 — 44,935 days ago. Mullen had lost two straight.LL

Smith Apr 1895O'Brien Oct 19030.2 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 Mullen and Philadelphia Jack O'Brien ever fought each other?
Yes. Jack Mullen and Philadelphia Jack O'Brien met once on October 12, 1903, and Philadelphia Jack O'Brien won by RTD in round 8.
The meeting

LOct 12, 1903 · O'Brien · RTD R8

Head to Head ↓
Who has the better record, Mullen or O'Brien?
Jack Mullen is 0-2 across the 2 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 %

Mullen0–20%

O'Brien147–16–2485%

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

Mullen0

O'Brien5537.4%

The Numbers ↓
Do Mullen and O'Brien have any common opponents?
Kill The Body's bout data shows no opponents that both Jack Mullen and Philadelphia Jack O'Brien have faced.
How much fight data does Kill The Body have on Mullen and O'Brien?
This comparison is drawn from 2 bouts tracked for Jack Mullen and 188 bouts tracked for Philadelphia Jack O'Brien. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Mullen2bouts

O'Brien188bouts

How They Win ↓

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