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Mariusz Ksiazkiewicz

"The Iron Pol"
11-3-0KSW #6Light HeavyweightCanadaCanadaLast 5
Amateur MMA 3-1

Last fight: Loss vs Sergiusz Zajac · TKO · Sep 20, 2025

LAST FIGHT
LOSSvs Sergiusz ZajacTKO · R1 1:07
KSWKSW 110: Grzebyk vs Tulshaev·September 20, 2025

No next fight booked yet. Follow Mariusz Ksiazkiewicz to hear the moment one is.

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CAREER SUMMARY

Mariusz Ksiazkiewicz holds a professional MMA record of 11-3-0. Ksiazkiewicz has won 11 fights: 5 by KO/TKO, 5 by submission, 1 by decision. Of 3 career losses, 1 came by KO/TKO and 1 by submission. Most recent fight: September 20, 2025. Tracked organizations: KSW, UFC.

Profile

Height
6'3"191 cm
Weight
185 lbs84 kg
Reach
75"191 cm
Stance
Southpaw
DOB
Oct 4, 1989
Age
37
Nationality
Canada
Birthplace
Winnipeg, Manitoba, Canada

Background

Credentials, amateur pedigree and camp

Camp

  • Winnipeg Academy of MMA

Career stats

Pro MMARecord: 11-3-0 · Source: UFCalendar
Striking
Strikes landed1.24per min
45% accuracy
Strikes absorbed3.60per min
39% avoided
Grappling
Takedowns landed3.72per 15 min
100% success
Submission attempts1.9per 15 min

Related fighters

Recent & upcoming opponents

Career history

  1. LOSS
    vs Sergiusz Zajac
    KSW 110: Grzebyk vs Tulshaev· Sep 20, 2025· Light Heavyweight· 11-3 vs 9-1
    TKO
    R1 · 1:07
  2. WIN
    vs Rafael Carvalho
    Iowa Fight Series 2· Apr 13, 2024· Light Heavyweight· 11-2 vs 17-8
    TKO
    R4 · 0:47
  3. LOSS
    vs Eli Aronov
    Unified MMA 45· May 27, 2022· Middleweight· 10-2 vs 6-0
    SUB
    R2 · 4:32
  4. WIN
    vs Alessandro Gambulino
    LFA 130: Ksiazkiewicz vs. Gambulino· Apr 22, 2022· Middleweight· 10-1 vs 12-4
    TKO
    R1 · 1:29
  5. WIN
    vs Graham Park
    Unified MMA 42· Dec 17, 2021· 9-1 vs 8-3
    TKO
    R1 · 1:25
  6. LOSS
    vs Mário Sousa
    UFC · Dana White's Contender Series 35· Nov 10, 2020· Middleweight· 8-1 vs 12-1
    UD
    R3 · 5:00
  7. WIN
    vs Guilherme Miranda
    Teofista: Fight For The Troops· Nov 9, 2019· Middleweight· 8-0 vs 18-9
    SUB
    R1 · 4:07
  8. WIN
    vs Jo Vallée
    TKO Fight Night 1· Aug 2, 2018· Middleweight· 7-0 vs 7-3
    SUB
    R3 · 1:13
  9. WIN
    vs Douglas McFresh
    Alaska FC 126· Oct 19, 2016· Light Heavyweight· 6-0 vs 5-1
    TKO
    R1 · 1:20
  10. WIN
    vs Micah Brakefield
    Prestige FC 2· Mar 12, 2016· Welterweight· 5-0 vs 6-7
    TKO
    R2 · 5:00
  11. WIN
    vs Steve Dubeck
    KOTC: Out Cold· Nov 15, 2013· Catchweight· 4-0 vs 5-7
    SUB
    R2 · 3:53
  12. WIN
    vs Ash Mashreghi
    AFC 16: Uprising· Mar 23, 2013· Welterweight· 3-0 vs 0-2
    SUB
    R1 · 1:55
  13. WIN
    vs Dejan Kajić
    AFC 11: Takeover· Sep 15, 2012· Catchweight· 2-0 vs 2-2
    UD
  14. WIN
    vs Henry Rowsell
    · May 13, 2011· Welterweight· 1-0 vs 0-3
    SUB
    R1 · 0:27

Official KSW Ranking

Mariusz Ksiazkiewicz's standing in the official KSW rankings.

Current
#6 Light Heavyweight
Peak
#6 Light Heavyweight
First ranked
Aug 1, 2026
Times ranked
4

Light Heavyweight

#1#5#10#15Aug 1, 2026 · #7Oct 16, 2026 · #6#6

View full KSW rankings →

UFCalendar Power Index rating

Current
1602▼22
Peak
1678Apr 22, 2022
Rated fights
14
1500160020122015201820212024May 13, 2011 · 1531Sep 15, 2012 · 1555Mar 23, 2013 · 1587Nov 15, 2013 · 1618Mar 12, 2016 · 1604Oct 19, 2016 · 1644Aug 2, 2018 · 1634Nov 9, 2019 · 1649Nov 10, 2020 · 1630Dec 17, 2021 · 1648Apr 22, 2022 · 1678May 27, 2022 · 1650Apr 13, 2024 · 1642Sep 20, 2025 · 16021602

See the full Power Index →

Frequently asked questions

When does Mariusz Ksiazkiewicz fight next?

Mariusz Ksiazkiewicz has no confirmed upcoming fight.

What is Mariusz Ksiazkiewicz's record?

Mariusz Ksiazkiewicz's professional MMA record is 11-3-0.

Who is Mariusz Ksiazkiewicz fighting next?

Mariusz Ksiazkiewicz's next opponent has not been announced.

Who did Mariusz Ksiazkiewicz fight last?

Mariusz Ksiazkiewicz most recently fought Sergiusz Zajac at KSW 110: Grzebyk vs Tulshaev on Saturday, September 20, 2025, LOSS (TKO).

What weight class does Mariusz Ksiazkiewicz fight in?

Mariusz Ksiazkiewicz fights at Light Heavyweight.

How many knockouts does Mariusz Ksiazkiewicz have?

Mariusz Ksiazkiewicz has 5 wins by KO/TKO and 5 wins by submission.

How tall is Mariusz Ksiazkiewicz?

Mariusz Ksiazkiewicz is 6'3" (191 cm) tall.

How much does Mariusz Ksiazkiewicz weigh?

Mariusz Ksiazkiewicz weighs 185 lbs (84 kg).

What is Mariusz Ksiazkiewicz's reach?

Mariusz Ksiazkiewicz has a reach of 75" (191 cm).

How old is Mariusz Ksiazkiewicz?

Mariusz Ksiazkiewicz is 37 years old (born Oct 4, 1989).

Where is Mariusz Ksiazkiewicz from?

Mariusz Ksiazkiewicz is from Canada.

Get Mariusz Ksiazkiewicz's fight history and stats as JSON with the MMA Fight Data API →