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Kill The Body

and the head will die

Chris O'Brien vs Mark Heffron — record, stats and common opponents compared

Chris O'Brien

Mark Heffron

Chris O'Brien (1-1 across 2 tracked bouts) and Mark Heffron (30-4-1) 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.

O'Brien

Tracked record

1–1

counted from 2 bouts Kill The Body has ingested

Heffron

30

Wins24 KO · 80%

4

Losses

1

Draw35 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

Heffron leads 1–0

Chris O'Brien and Mark Heffron have met 1 time; Heffron leads 1–0.

Chris O'Brien and Mark Heffron have met 1 time; Heffron leads 1–0.
Met2010Nov 13Series
Chris O'BrienFighter ALLost0–1W–L
Mark HeffronFighter BWWon1–0W–L
ResultTKOR11Meeting

The Numbers

O'Brien 1 · Heffron 5 of 6 measurable rows
O'BrienHeffron
Record†
1-130-4-1 (edge)
Win %0–100%
50%
87.1% (edge)
Wins by knockoutmax 24
0
24 (edge)
KO ratenot comparable
—80%
Stoppage rate (tracked wins)‡0–100%
0%
80% (edge)
Times stopped‡max 4
1 (edge)
4
Title reignslevelmax 0
0
0
Bouts per year§max 2.6
0.8
2.6 (edge)
Bouts trackedcoveragemax 35
2
35

† 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
Chris O'Brien: No height on file
Mark Heffron: 5′11″
Reachnot held
Chris O'Brien: No reach on file
Mark Heffron: 72″
Agenot held
Chris O'Brien: No date of birth
Mark Heffron: 34
Stance
Chris O'Brien: Not recorded
Mark Heffron: Orthodox

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

How They Win

Tracked bouts only
Chris O'Brien1 win · from 2 tracked bouts

Chris O'Brien: 1 tracked win — 1 on the cards (100%). Counted from 2 bouts Kill The Body has ingested.

1 on the cards 100%

Mark Heffron30 wins · from 35 tracked bouts

Mark Heffron: 30 tracked wins — 24 by KO/TKO (80%) and 6 on the cards (20%). Counted from 35 bouts Kill The Body has ingested.

24 by KO/TKO 80%6 on the cards 20%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Chris O'Brien 2, Mark Heffron 35 — 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

Chris O'Brien last boxed on Nov 13, 2010 — 5,818 days ago. O'Brien had won one in a row before losing by stoppage to Mark Heffron.WL

Laight May 2008Heffron Nov 20100.8 tracked bouts per year

Mark Heffron last boxed on May 25, 2024 — 876 days ago. Heffron had won one in a row before losing by stoppage to Christian M'billi.WWLWL

Clarke Jul 2022Bulacio Sep 2022Cullen Sep 2023Ksendzov Feb 2024M'billi May 20242.6 tracked bouts per year

Common Questions

With the rows behind them
Have Chris O'Brien and Mark Heffron ever fought each other?
Yes. Chris O'Brien and Mark Heffron met once on November 13, 2010, and Mark Heffron won by TKO in round 1.
The meeting

LNov 13, 2010 · Heffron · TKO R1

Head to Head ↓
Who has the better record, O'Brien or Heffron?
Chris O'Brien is 1-1 across the 2 bouts Kill The Body has tracked and Mark Heffron is 30-4-1. Mark Heffron has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
Records · win %

O'Brien1–150%

Heffron30–4–187.1%

The Numbers ↓
Who has more knockouts, O'Brien or Heffron?
Chris O'Brien has 0 knockout wins and Mark Heffron has 24. Mark Heffron has more.
Knockout wins · KO rate

O'Brien0

Heffron2480%

The Numbers ↓
Do O'Brien and Heffron have any common opponents?
Kill The Body's bout data shows no opponents that both Chris O'Brien and Mark Heffron have faced.
How much fight data does Kill The Body have on O'Brien and Heffron?
This comparison is drawn from 2 bouts tracked for Chris O'Brien and 35 bouts tracked for Mark Heffron. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

O'Brien2bouts

Heffron35bouts

How They Win ↓

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