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Kill The Body

and the head will die

Juan Díaz vs William Irwin — record, stats and common opponents compared

🇺🇸UNITED STATES

Juan Díaz

🇨🇦CANADA

William Irwin

Juan Díaz (42-4) and William Irwin (42-6) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Díaz

42

Wins21 KO · 50%

4

Losses

0

Draws48 tracked bouts

Irwin

42

Wins

6

Losses

0

Draws48 tracked bouts

Head to Head

Díaz leads 1–0

Juan Díaz and William Irwin have met 1 time; Díaz leads 1–0.

Juan Díaz and William Irwin have met 1 time; Díaz leads 1–0.
Met2005Jan 21Series
Juan DíazFighter AWWon1–0W–L
William IrwinFighter BLLost0–1W–L
ResultTKOR91Meeting

The Numbers

Díaz 5 · Irwin 3 of 8 measurable rows
DíazIrwin
Record
42-4 (edge)42-6
Win %0–100%
91.3% (edge)
87.5%
Wins by knockoutmax 21
21 (edge)
0
KO rate0–100%
50% (edge)
0%
Stoppage rate (tracked wins)†0–100%
50%
71% (edge)
Times stopped†max 3
3
1 (edge)
Title reignsmax 4
4 (edge)
0
Bouts per year‡max 4
1.9
4 (edge)
Bouts trackedlevelmax 48
48
48

† 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
Juan Díaz: 5′6″
William Irwin: No height on file
Reachnot held
Juan Díaz: 67″
William Irwin: No reach on file
Age15 yrs apart
Juan Díaz: 43
William Irwin: 58
Stance
Juan Díaz: Orthodox
William Irwin: Not recorded

Juan Díaz left, William Irwin right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Juan Díaz42 wins · from 48 tracked bouts

Juan Díaz: 42 tracked wins — 21 by KO/TKO (50%) and 21 on the cards (50%). Counted from 48 bouts Kill The Body has ingested.

21 by KO/TKO 50%21 on the cards 50%

William Irwin42 wins · from 48 tracked bouts

William Irwin: 42 tracked wins — 30 by KO/TKO (71%) and 12 on the cards (29%). Counted from 48 bouts Kill The Body has ingested.

30 by KO/TKO 71%12 on the cards 29%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Juan Díaz 48, William Irwin 48 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · even on 1

Díaz

Opponent

Irwin

  • Juan Díaz

    Win, TKO 7

    2003

    BaileyEven

    William Irwin

    Win, TKO 7

    2000

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

Juan Díaz has lost two straight, after three straight wins. Díaz last boxed on Feb 28, 2026 — 234 days ago.WWWLL

Cardenas Sep 2014García Mar 2016Vasquez Aug 2016Cieślak Apr 2024Peralta Feb 20261.9 tracked bouts per year

William Irwin last boxed on Jan 21, 2005 — 7,942 days ago. Irwin had won four in a row before losing by stoppage to Juan Díaz.WWWWL

Howard Jan 2003Sosa Apr 2003Riggs Jul 2003Bizzarro Jul 2004Díaz Jan 20054 tracked bouts per year

Common Questions

With the rows behind them
Have Juan Díaz and William Irwin ever fought each other?
Yes. Juan Díaz and William Irwin met once on January 21, 2005, and Juan Díaz won by TKO in round 9.
The meeting

WJan 21, 2005 · Díaz · TKO R9

Head to Head ↓
Who has the better record, Díaz or Irwin?
Juan Díaz is 42-4 and William Irwin is 42-6. Juan Díaz has the higher win percentage.
Records · win %

Díaz42–491.3%

Irwin42–687.5%

The Numbers ↓
Who has more knockouts, Díaz or Irwin?
Juan Díaz has 21 knockout wins and William Irwin has 0. Juan Díaz has more.
Knockout wins · KO rate

Díaz2150%

Irwin0

The Numbers ↓
Do Díaz and Irwin have any common opponents?
Juan Díaz and William Irwin share 1 common opponent: John Bailey. Neither fighter fared better across the shared opponents overall.
Shared opponent

John BaileyWW

Common Opponents ↓
How much fight data does Kill The Body have on Díaz and Irwin?
This comparison is drawn from 48 bouts tracked for Juan Díaz and 48 bouts tracked for William Irwin. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Díaz48bouts

Irwin48bouts

How They Win ↓

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