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Kill The Body

and the head will die

Mateusz Masternak vs Michael Simms — record, stats and common opponents compared

🇵🇱CRUISERWEIGHT

Mateusz Masternak

🇺🇸UNITED STATES

Michael Simms

Mateusz Masternak (50-7) and Michael Simms (22-16-2) are compared on record, finishing method, activity, and common opponents on Kill The Body. The two have met once. They share 1 common opponent.

Masternak

50

Wins33 KO · 66%

7

Losses

0

Draws57 tracked bouts

Simms

22

Wins

16

Losses

2

Draws40 tracked bouts

Head to Head

Masternak leads 1–0

Mateusz Masternak and Michael Simms have met 1 time; Masternak leads 1–0.

Mateusz Masternak and Michael Simms have met 1 time; Masternak leads 1–0.
Met2012Feb 4Series
Mateusz MasternakFighter AWWon1–0W–L
Michael SimmsFighter BLLost0–1W–L
ResultTKOR41Meeting

The Numbers

Masternak 5 · Simms 1 of 6 measurable rows
MasternakSimms
Record
50-7 (edge)22-16-2
Win %0–100%
87.7% (edge)
57.5%
Wins by knockoutmax 33
33 (edge)
0
KO rate0–100%
66% (edge)
0%
Stoppage rate (tracked wins)†0–100%
66% (edge)
64%
Times stopped†levelmax 2
2
2
Title reignslevelmax 0
0
0
Bouts per year‡max 3.5
2.9
3.5 (edge)
Bouts trackedcoveragemax 57
57
40

† 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

Age13 yrs apart
Mateusz Masternak: 39
Michael Simms: 52
Stance
Mateusz Masternak: Orthodox
Michael Simms: Not recorded

Mateusz Masternak left, Michael Simms right, as everywhere on this page. Age is stated, not scored — neither age nor stance carries an edge.

How They Win

Tracked bouts only
Mateusz Masternak50 wins · from 57 tracked bouts

Mateusz Masternak: 50 tracked wins — 33 by KO/TKO (66%) and 17 on the cards (34%). Counted from 57 bouts Kill The Body has ingested.

33 by KO/TKO 66%17 on the cards 34%

Michael Simms22 wins · from 40 tracked bouts

Michael Simms: 22 tracked wins — 14 by KO/TKO (64%) and 8 on the cards (36%). Counted from 40 bouts Kill The Body has ingested.

14 by KO/TKO 64%8 on the cards 36%

One square per tracked win. Counted from the bouts Kill The Body has ingested for each fighter — Mateusz Masternak 57, Michael Simms 40 — not from a career-complete method table.

Common Opponents

1 shared

1 shared · even on 1

Masternak

Opponent

Simms

  • Mateusz Masternak

    Loss, TKO 11

    2013

    DrozdEven

    Michael Simms

    Loss, UD

    2008

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

Mateusz Masternak had won three in a row before losing a decision to Viddal Riley. Masternak last boxed on Apr 4, 2026 — 196 days ago.LWWWL

Billam-Smith Dec 2023Olivier Apr 2024Masson Nov 2024Djeko Oct 2025Riley Apr 20262.9 tracked bouts per year

Michael Simms last boxed on Feb 4, 2012 — 5,369 days ago. Simms had won one in a row before losing by stoppage to Mateusz Masternak.LLLWL

Frenkel Mar 2010Dudchenko Jun 2011Chakhkiyev Sep 2011Bercier Nov 2011Masternak Feb 20123.5 tracked bouts per year

Common Questions

With the rows behind them
Have Mateusz Masternak and Michael Simms ever fought each other?
Yes. Mateusz Masternak and Michael Simms met once on February 4, 2012, and Mateusz Masternak won by TKO in round 4.
The meeting

WFeb 4, 2012 · Masternak · TKO R4

Head to Head ↓
Who has the better record, Masternak or Simms?
Mateusz Masternak is 50-7 and Michael Simms is 22-16-2. Mateusz Masternak has the higher win percentage.
Records · win %

Masternak50–787.7%

Simms22–16–257.5%

The Numbers ↓
Who has more knockouts, Masternak or Simms?
Mateusz Masternak has 33 knockout wins and Michael Simms has 0. Mateusz Masternak has more.
Knockout wins · KO rate

Masternak3366%

Simms0

The Numbers ↓
Do Masternak and Simms have any common opponents?
Mateusz Masternak and Michael Simms share 1 common opponent: Grigory Drozd. Neither fighter fared better across the shared opponents overall.
Shared opponent

Grigory DrozdLL

Common Opponents ↓
How much fight data does Kill The Body have on Masternak and Simms?
This comparison is drawn from 57 bouts tracked for Mateusz Masternak and 40 bouts tracked for Michael Simms. Method and activity splits reflect those bouts only.
Bouts tracked · no edge

Masternak57bouts

Simms40bouts

How They Win ↓

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