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Kill The Body

and the head will die

Callum Simpson vs Zak Chelli — record, stats and common opponents compared

Callum Simpson

Zak Chelli

Callum Simpson (19-1) and Zak Chelli (17-3-1) 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.

Simpson

19

Wins

1

Loss

0

Draws3 tracked bouts

Chelli

17

Wins9 KO · 53%

3

Losses

1

Draw21 tracked bouts

Head to Head

Simpson leads 1–0

Callum Simpson and Zak Chelli have met 1 time; Simpson leads 1–0.

Callum Simpson and Zak Chelli have met 1 time; Simpson leads 1–0.
Met2024Aug 3Series
Callum SimpsonFighter AWWon1–0W–L
Zak ChelliFighter BLLost0–1W–L
ResultUD1Meeting

The Numbers

Simpson 2 · Chelli 5 of 7 measurable rows
SimpsonChelli
Record
19-1 (edge)17-3-1
Win %0–100%
95% (edge)
83.3%
Wins by knockoutmax 9
0
9 (edge)
KO rate0–100%
0%
52.94% (edge)
Stoppage rate (tracked wins)†0–100%
0%
53% (edge)
Times stopped†max 1
1
0 (edge)
Title reignslevelmax 0
0
0
Bouts per year‡max 2.3
1.5
2.3 (edge)
Bouts trackedcoveragemax 21
3
21

† 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
Callum Simpson: No height on file
Zak Chelli: 6′0″
Agenot held
Callum Simpson: No date of birth
Zak Chelli: 28
Stance
Callum Simpson: Not recorded
Zak Chelli: Orthodox

Callum Simpson left, Zak Chelli right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Callum Simpson2 wins · from 3 tracked bouts

Callum Simpson: 2 tracked wins — 2 on the cards (100%). Counted from 3 bouts Kill The Body has ingested.

2 on the cards 100%

Zak Chelli17 wins · from 21 tracked bouts

Zak Chelli: 17 tracked wins — 9 by KO/TKO (53%), 7 on the cards (41%) and 1 by another method or unrecorded (6%). Counted from 21 bouts Kill The Body has ingested.

9 by KO/TKO 53%7 on the cards 41%1 by another method or unrecorded 6%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Callum Simpson 3, Zak Chelli 21 — 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

Callum Simpson has won once since losing by stoppage to Troy Williamson. Simpson last boxed on Aug 8, 2026 — 72 days ago.WLW

Chelli Aug 2024Williamson Dec 2025Williamson Aug 20261.5 tracked bouts per year

Zak Chelli has won two straight since losing a decision to Callum Simpson. Chelli last boxed on May 9, 2026 — 163 days ago.WWLWW

Grannum Sep 2023Cullen Jan 2024Simpson Aug 2024Hepple Jun 2025Morrell May 20262.3 tracked bouts per year

Common Questions

With the rows behind them
Have Callum Simpson and Zak Chelli ever fought each other?
Yes. Callum Simpson and Zak Chelli met once on August 3, 2024, and Callum Simpson won by UD.
The meeting

WAug 3, 2024 · Simpson · UD

Head to Head ↓
Who has the better record, Simpson or Chelli?
Callum Simpson is 19-1 and Zak Chelli is 17-3-1. Callum Simpson has the higher win percentage.
Records · win %

Simpson19–195%

Chelli17–3–183.3%

The Numbers ↓
Who has more knockouts, Simpson or Chelli?
Callum Simpson has 0 knockout wins and Zak Chelli has 9. Zak Chelli has more.
Knockout wins · KO rate

Simpson0

Chelli952.9%

The Numbers ↓
Do Simpson and Chelli have any common opponents?
Kill The Body's bout data shows no opponents that both Callum Simpson and Zak Chelli have faced.
How much fight data does Kill The Body have on Simpson and Chelli?
This comparison is drawn from 3 bouts tracked for Callum Simpson and 21 bouts tracked for Zak Chelli. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Simpson3bouts

Chelli21bouts

How They Win ↓

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