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.
Juan Díaz (42-4) and William Irwin (42-6 across 48 tracked bouts) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.
Juan Díaz vs William Irwin — record, stats and common opponents compared
Head to Head
Juan Díaz leads 1–0- Juan Díaz wonIrwin vs DíazJan 21, 2005 · TKO · R9
The Numbers
- 42-4 (edge)
- Record
- 42-6
- 91.3% (edge)
- Win %
- 87.5%
- 21
- Wins by knockout
- 30 (edge)
- 50%
- KO rate
- —
- 52%
- Stoppage rate (tracked wins)
- 71% (edge)
- 3
- Times stopped
- 1 (edge)
- 4 (edge)
- Title reigns
- 0
- 1.9
- Bouts per year
- 4 (edge)
- 50
- Bouts tracked
- 48
One or both records are tracked, not career-verified.
Counted from bouts Kill The Body has ingested, not a career total.
Counted from bouts Kill The Body has ingested, not a career total.
Across each fighter's tracked career span.
Tale of the Tape
- 5′6″ (168 cm)
- Height
- —
- 67″ (170 cm)
- Reach
- —
- 42
- Age
- 58
- Orthodox
- Stance
- —
- United States
- Nationality
- Canada
How They Win
Tracked bouts onlyJuan Díaz · 44 wins
KO/TKO
23
Decision
21
Other
0
William Irwin · 42 wins
KO/TKO
30
Decision
12
Other
0
Counted from the bouts Kill The Body has ingested for each fighter (50 and 48 respectively), not from a career-complete method table.
Common Opponents
1 sharedShared opponents are matched on fighter identity, not on name — two different fighters with the same name never merge into one row.
Current Form
Juan Díaz
LLWWW
L2 streak · last fought Feb 28, 2026
William Irwin
LWWWW
L1 streak · last fought Jan 21, 2005
Common Questions
- 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.
- Who has the better record, Juan Díaz or William Irwin?
- Juan Díaz is 42-4 and William Irwin is 42-6 across the 48 bouts Kill The Body has tracked. Juan Díaz has the higher win percentage. Records shown as tracked have not yet been independently verified as complete career totals.
- Who has more knockouts, Juan Díaz or William Irwin?
- Juan Díaz has 21 knockout wins and William Irwin has 30. William Irwin has more.
- Do Juan Díaz and William 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.
- How much fight data does Kill The Body have on Juan Díaz and William Irwin?
- This comparison is drawn from 50 bouts tracked for Juan Díaz and 48 bouts tracked for William Irwin. Method and activity splits reflect those bouts only.