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Kill The Body

and the head will die

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

🇮🇪IRELAND

Peter Maher

🇺🇸HEAVYWEIGHT

Philadelphia Jack O'Brien

Peter Maher (142-28-6) 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 2 times. They share 4 common opponents.

Maher

142

Wins107 KO · 75%

28

Losses

6

Draws18 tracked bouts

O'Brien

147

Wins55 KO · 37%

16

Losses

24

Draws188 tracked bouts

Head to Head

O'Brien leads 2–0

Peter Maher and Philadelphia Jack O'Brien have met 2 times; O'Brien leads 2–0.

Peter Maher and Philadelphia Jack O'Brien have met 2 times; O'Brien leads 2–0.
Met1902Oct 31902Oct 30Series
Peter MaherFighter ALLostLLost0–2W–L
Philadelphia Jack O'BrienFighter BWWonWWon2–0W–L
ResultNWSNWS2Meetings

The Numbers

Maher 3 · O'Brien 4 of 7 measurable rows
MaherO'Brien
Record
142-28-6147-16-24 (edge)
Win %0–100%
82.4%
85% (edge)
Wins by knockoutmax 107
107 (edge)
55
KO rate0–100%
75.35% (edge)
37.41%
Stoppage rate (tracked wins)†0–100%
50% (edge)
37%
Times stopped†max 9
9
3 (edge)
Title reignslevelmax 0
0
0
Bouts per year‡max 12.8
1
12.8 (edge)
Bouts trackedcoveragemax 188
18
188

† 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 comparable
Peter Maher: Died aged 71
Philadelphia Jack O'Brien: Died aged 64
Stance
Peter Maher: Orthodox
Philadelphia Jack O'Brien: Orthodox

Peter Maher 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
Peter Maher4 wins · from 18 tracked bouts

Peter Maher: 4 tracked wins — 2 by KO/TKO (50%), 1 on the cards (25%) and 1 by another method or unrecorded (25%). Counted from 18 bouts Kill The Body has ingested.

2 by KO/TKO 50%1 on the cards 25%1 by another method or unrecorded 25%

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 — Peter Maher 18, Philadelphia Jack O'Brien 188 — not from a career-complete method table.

Common Opponents

4 shared

4 shared · O'Brien better on 4

Maher

Opponent

O'Brien

  • Peter Maher

    0–2 against

    Loss, KO 2

    1908

    Loss, KO 5

    1900

    McCoyO'Brien better

    Philadelphia Jack O'Brien

    Draw, NWS

    1904

  • Peter Maher

    Loss, KO 2

    1907

    HartO'Brien better

    Philadelphia Jack O'Brien

    1–1 against

    Loss, NWS

    1903

    Win, NWS

    1902

  • Peter Maher

    0–2 against

    Loss, KO

    1896

    Loss, RTD

    1892

    FitzsimmonsO'Brien better

    Philadelphia Jack O'Brien

    1–1 against

    Win, RTD 13

    1905

    Loss, NWS

    1904

  • Peter Maher

    1–2 against

    Loss, KO 2

    1903

    Loss, PTS

    1900

    Win, KO 6

    1896

    ChoynskiO'Brien better

    Philadelphia Jack O'Brien

    2–0 against

    Win, NWS

    1903

    Win, PTS

    1902

Both sides are set at the same size on purpose. Kill The Body does not score a second-round knockout above a split decision — the edge counts losses first and wins as the tiebreak, and the rest is yours to argue. Shared opponents are matched on fighter identity, not on name, so two different fighters with the same name never merge into one row.

Current Form

Oldest left · newest right

Peter Maher has lost six straight. Maher last boxed on Jul 24, 1908.LLLLL

O'Brien Oct 1902Choynski Jan 1903Gardiner Apr 1903Hart Apr 1907McCoy Jul 19081 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 Peter Maher and Philadelphia Jack O'Brien ever fought each other?
Yes. Peter Maher and Philadelphia Jack O'Brien have met 2 times and Philadelphia Jack O'Brien leads the series 2-0.
The 2 meetings

LOct 30, 1902 · O'Brien · NWS

LOct 3, 1902 · O'Brien · NWS

Head to Head ↓
Who has the better record, Maher or O'Brien?
Peter Maher is 142-28-6 and Philadelphia Jack O'Brien is 147-16-24. Philadelphia Jack O'Brien has the higher win percentage.
Records · win %

Maher142–28–682.4%

O'Brien147–16–2485%

The Numbers ↓
Who has more knockouts, Maher or O'Brien?
Peter Maher has 107 knockout wins and Philadelphia Jack O'Brien has 55. Peter Maher has more.
Knockout wins · KO rate

Maher10775.4%

O'Brien5537.4%

The Numbers ↓
Do Maher and O'Brien have any common opponents?
Peter Maher and Philadelphia Jack O'Brien share 4 common opponents: Kid McCoy, Marvin Hart and Bob Fitzsimmons (and 1 other). Philadelphia Jack O'Brien fared better against 4 of them.
4 shared opponents

Kid McCoyLD

Marvin HartL1–1

Bob FitzsimmonsL1–1

Joe Choynski1–2W

Common Opponents ↓
How much fight data does Kill The Body have on Maher and O'Brien?
This comparison is drawn from 18 bouts tracked for Peter Maher and 188 bouts tracked for Philadelphia Jack O'Brien. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Maher18bouts

O'Brien188bouts

How They Win ↓

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