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Kill The Body

and the head will die

Jackie O'Brien vs Tony DeMarco — record, stats and common opponents compared

Jackie O'Brien

🇺🇸WELTERWEIGHT

Tony DeMarco

Jackie O'Brien (0-3 across 3 tracked bouts) and Tony DeMarco (58-12-1) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 2 common opponents.

O'Brien

Tracked record

0–3

counted from 3 bouts Kill The Body has ingested

DeMarco

58

Wins33 KO · 57%

12

Losses

1

Draw71 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

DeMarco leads 1–0

Jackie O'Brien and Tony DeMarco have met 1 time; DeMarco leads 1–0.

Jackie O'Brien and Tony DeMarco have met 1 time; DeMarco leads 1–0.
Met1952Mar 1Series
Jackie O'BrienFighter ALLost0–1W–L
Tony DeMarcoFighter BWWon1–0W–L
ResultSD1Meeting

The Numbers

O'Brien 1 · DeMarco 5 of 6 measurable rows
O'BrienDeMarco
Record†
0-358-12-1 (edge)
Win %0–100%
0%
82.4% (edge)
Wins by knockoutmax 33
0
33 (edge)
KO ratenot comparable
—56.9%
Stoppage rate (tracked wins)‡not comparable
—57%
Times stopped‡max 7
0 (edge)
7
Title reignsmax 2
0
2 (edge)
Bouts per year§max 5.3
0.8
5.3 (edge)
Bouts trackedcoveragemax 71
3
71

† 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

Heightnot held
Jackie O'Brien: No height on file
Tony DeMarco: 5′5″
Agenot held
Jackie O'Brien: No date of birth
Tony DeMarco: Died aged 89
Stance
Jackie O'Brien: Not recorded
Tony DeMarco: Orthodox

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

How They Win

Tracked bouts only
Jackie O'Brien0 wins · from 3 tracked bouts

Jackie O'Brien: no tracked wins in the 3 bouts Kill The Body has ingested.

No tracked wins for O'Brien yet.

Tony DeMarco58 wins · from 71 tracked bouts

Tony DeMarco: 58 tracked wins — 33 by KO/TKO (57%) and 25 on the cards (43%). Counted from 71 bouts Kill The Body has ingested.

33 by KO/TKO 57%25 on the cards 43%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Jackie O'Brien 3, Tony DeMarco 71 — not from a career-complete method table.

Common Opponents

2 shared

2 shared · O'Brien better on 1 · DeMarco better on 1

O'Brien

Opponent

DeMarco

  • Jackie O'Brien

    Loss, MD

    1952

    BasilioO'Brien better

    Tony DeMarco

    0–2 against

    Loss, TKO 12

    1955

    Loss, TKO 12

    1955

  • Jackie O'Brien

    Loss, UD

    1955

    SaxtonDeMarco better

    Tony DeMarco

    Win, TKO 14

    1955

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

Jackie O'Brien last boxed on Oct 25, 1955 — 25,930 days ago. O'Brien had lost three straight.LLL

DeMarco Mar 1952Basilio Mar 1952Saxton Oct 19550.8 tracked bouts per year

Tony DeMarco has won two straight since losing by stoppage to Denny Moyer. DeMarco last boxed on Feb 6, 1962.WWLWW

Monroe Mar 1959Connors Apr 1959Moyer Feb 1960Jordan Dec 1961Redl Feb 19625.3 tracked bouts per year

Common Questions

With the rows behind them
Have Jackie O'Brien and Tony DeMarco ever fought each other?
Yes. Jackie O'Brien and Tony DeMarco met once on March 1, 1952, and Tony DeMarco won by SD.
The meeting

LMar 1, 1952 · DeMarco · SD

Head to Head ↓
Who has the better record, O'Brien or DeMarco?
Jackie O'Brien is 0-3 across the 3 bouts Kill The Body has tracked and Tony DeMarco is 58-12-1. Tony DeMarco has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Records · win %

O'Brien0–30%

DeMarco58–12–182.4%

The Numbers ↓
Who has more knockouts, O'Brien or DeMarco?
Jackie O'Brien has 0 knockout wins and Tony DeMarco has 33. Tony DeMarco has more.
Knockout wins · KO rate

O'Brien0

DeMarco3356.9%

The Numbers ↓
Do O'Brien and DeMarco have any common opponents?
Jackie O'Brien and Tony DeMarco share 2 common opponents: Carmen Basilio and Johnny Saxton. Neither fighter fared better across the shared opponents overall.
2 shared opponents

Carmen BasilioLL

Johnny SaxtonLW

Common Opponents ↓
How much fight data does Kill The Body have on O'Brien and DeMarco?
This comparison is drawn from 3 bouts tracked for Jackie O'Brien and 71 bouts tracked for Tony DeMarco. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

O'Brien3bouts

DeMarco71bouts

How They Win ↓

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