Light Heavyweight · Men

Sergiusz Zając

Poland Spartakus Rzeszów debut 2015
Held by Damian Piwowarczyk
Form W W W W L
Elo 1,595 peak 1,679 · 20 Sep 2025 84 below it
Tapology Sherdog
11-3pro record
1L current streak
1,571best win, Elo
1,153average opponent
-- born 9 Oct 1998
76.0" / 74.4" height / reach

Elo history

Hover for the fight at that point; dots are wins and losses; the band is the typical prime for men, ages 27–36

Record

-- – --
Rating by method KO1,592 Sub1,098 Dec1,179

Style profile

Each axis is a percentile of light heavyweight fighters with five pro bouts (2,162 of them); further out is better. Hover a point for the number.
KO Submission Decision Finishes Durability Win rate Opposition Activity
From the record and the method ratings

Similar careers

Who looked like this after 12 pro bouts, and what happened next

After 12 bouts (2025): 1,599 Elo, 10-2, aged 26, average opponent 1,173.

  1. Modestas Bukauskas then 1,573, 10-2, aged 26 11-5 after peaked 1,787 ▲
  2. Jan Błachowicz then 1,597, 10-2, aged 27 19-10 after peaked 2,236 ▲
  3. Artur Astakhov then 1,551, 10-2, aged 26 14-10 after peaked 1,626 ▲
  4. Da Woon Jung then 1,521, 10-2, aged 25 5-5 after peaked 1,822 ▲
  5. Ryan Jimmo then 1,573, 10-2, aged 28 9-4 after peaked 1,821 ▲
  6. Lito Adiwang then 1,600, 10-2, aged 27 · Flyweight 8-5 after peaked 1,655 ▲

Best wins

By the opponent's Elo on the night
  1. Mariusz Książkiewicz KO/TKO R1 · 20 Sep 2025 · Konfrontacja Sztuk Walki 1,571
  2. Kleber Silva KO/TKO R1 · 24 Aug 2024 · Konfrontacja Sztuk Walki 1,488
  3. Michał Dreczkowski KO/TKO R1 · 8 Mar 2025 · Konfrontacja Sztuk Walki 1,413
  4. Bartłomiej Gładkowicz Decision R3 · 27 Jan 2024 · Babilon MMA 1,312
  5. Łukasz Kulpa KO/TKO R1 · 8 Jul 2022 · Babilon MMA 1,201

Losses

Newest first
  1. Damian Piwowarczyk KO/TKO R2 · 14 Mar 2026 · Konfrontacja Sztuk Walki 1,690
  2. Adam Biegański KO/TKO R1 · 11 Jun 2021 · The War 1,238
  3. Łukasz Olech Submission R1 · 27 Nov 2020 · Opolscy Wojownicy 1,167

Fight history

33 bouts, newest first; amateur bouts are shaded. Hover a heading for what it means.
# Date Result Opponent Weight class Method Round Score Elo ± Opp Elo Odds Event
33 14 Mar 202627.4 yrs L11-3 Damian Piwowarczyk 10-4 · 28.5 yrs Light Heavyweight KO/TKOPunches R26:22 0.00 1,679→1,595 -85 1,690 +125→+110 KSW 116: Bartosiński vs. Fleminas Konfrontacja Sztuk Walki
32 20 Sep 202526.9 yrs W11-2 Mariusz Książkiewicz 11-2 · 36.0 yrs Light Heavyweight KO/TKOKnee Injury & Hammerfists R11:07 1.00 1,599→1,679 +81 1,571 -225→-265 KSW 110: Grzebyk vs. Tulshaev Konfrontacja Sztuk Walki
31 8 Mar 202526.4 yrs W10-2 Michał Dreczkowski 5-0 · 24.4 yrs Light Heavyweight KO/TKOKnees R14:00 1.00 1,542→1,599 +56 1,413 -120→-120 KSW 104: Kuberski vs. Romanowski Konfrontacja Sztuk Walki
30 24 Aug 202425.9 yrs W9-2 Kleber Silva 22-13 (1) · 36.7 yrs Light Heavyweight KO/TKOElbows R11:36 1.00 1,444→1,542 +99 1,488 +120→+120 KSW 97: Bajor vs. Scheffel Konfrontacja Sztuk Walki
29 1 Jun 202425.6 yrs W8-2 Ramon Drum 1-1 Light Heavyweight KO/TKOElbows R12:20 1.00 1,430→1,444 +14 1,002 – Babilon MMA 45: Rakowicz vs. Politylo Babilon MMA
28 27 Jan 202425.3 yrs W7-2 Bartłomiej Gładkowicz 10-4 · 27.6 yrs Light Heavyweight DecisionUnanimous R315:00 0.84 1,389→1,430 +41 1,312 – Babilon MMA 42: Gladkowicz vs. Zajac Babilon MMA
27 22 Sep 202325.0 yrs W6-2 Dominik Owsiany 2-3 Open Weight KO/TKOElbows R14:31 1.00 1,352→1,389 +37 1,123 – Babilon MMA 38: Lopaczyk vs. Jakimowicz Babilon MMA
26 1 Oct 202224.0 yrs W5-2 Wincenty Krawczyk debut Light Heavyweight KO/TKOKnees & Punches R12:50 1.00 1,321→1,352 +31 1,056 – Carpathian Warriors 10: Road to Babilon Carpathian Warriors
25 8 Jul 202223.7 yrs W4-2 Łukasz Kulpa 3-2 Light Heavyweight KO/TKOPunches R12:45 1.00 1,244→1,321 +77 1,201 -133→-138 Babilon MMA 30: Sudolski vs. Mysiala Babilon MMA
24 19 Feb 202223.4 yrs W3-2 Paweł Całkowski debut Light Heavyweight KO/TKOPunches R310:00 1.00 1,198→1,244 +47 1,022 – Prime Show MMA 1: Zadyma Prime Show MMA
23 11 Jun 202122.7 yrs W2-2 Dawid Rachwał debut Heavyweight KO/TKOKO/TKO R1 1.00 1,136→1,198 +61 1,028 – The War 1 The War
22 11 Jun 202122.7 yrs W1-2 Michał Więcławski debut Open Weight KO/TKOKO/TKO -- 1.00 1,056→1,136 +81 1,028 – The War 1 The War
21 11 Jun 202122.7 yrs L0-2 Adam Biegański 7-4 · 27.5 yrs Heavyweighttitle KO/TKOKO/TKO R1 0.00 1,113→1,056 -57 1,238 – The War 1 The War
20 15 May 202122.6 yrs L10-9 Kacper Szalast 3-1 · 24.9 yrs Light Heavyweight DecisionDecision R14:00 0.20 1,149→1,113 -36 1,168 – ALMMA 193: Puchar Polski MMA 2021 Amatorska Liga MMA am
19 15 May 202122.6 yrs W10-8 Kamil Gajewski 1-1 Light Heavyweight SubGuillotine Choke R12:53 1.00 1,086→1,149 +63 1,071 – ALMMA 193: Puchar Polski MMA 2021 Amatorska Liga MMA am
18 14 Feb 202122.4 yrs W9-8 Łukasz Nowak 6-1 Light Heavyweight KO/TKOKO/TKO R1 1.00 979→1,086 +108 1,242 – ALMMA 190: Bull Terror Challenge Amatorska Liga MMA am
17 14 Feb 202122.4 yrs L8-8 Kacper Szalast 2-1 · 24.6 yrs Light Heavyweighttitle SubKeylock R11:40 0.00 1,027→979 -49 1,119 – ALMMA 190: Bull Terror Challenge Amatorska Liga MMA am
16 27 Nov 202022.1 yrs L0-1 Łukasz Olech debut Catchweight SubSubmission R1 0.00 1,098→1,027 -70 1,167 – Opolscy Wojownicy 5: Bitwa nad Odrą Opolscy Wojownicy
15 15 Feb 202021.4 yrs L8-7 Kamil Mękal 6-1-1 Middleweight DecisionUnanimous R39:00 0.16 1,133→1,098 -36 1,181 – Carpathian Warriors 8: Polska vs. Francja Carpathian Warriors am
14 19 Oct 201921.0 yrs W8-6 Mikołaj Zbierski 1-0 · 22.8 yrs Middleweight DecisionUnanimous R39:00 0.84 1,069→1,133 +64 1,177 – Gala Sportów Walki w Międzychodzie 10: Hellish Showdown MMA Devil Międzychód am
13 8 Jun 201920.7 yrs L7-6 Szymon Powarzyński debut Middleweight SubTriangle Choke R37:30 0.00 1,151→1,069 -82 1,062 – Carpathian Warriors 6 Carpathian Warriors am
12 30 Mar 201920.5 yrs W7-5 Kamil Nowak 1-1 Middleweight KO/TKOPunches R11:56 1.00 1,089→1,151 +62 1,072 – Victory Fighting Championship League 9 VFCL MMA Championships am
11 2 Nov 201820.1 yrs L6-5 Piotr Mochocki 4-0 Middleweight DecisionUnanimous R39:00 0.16 1,112→1,089 -23 1,229 – Madness Cage Fighting 4: Champions Madness Cage Fighting am
10 19 Nov 201719.1 yrs L6-4 Andrzej Kubas debut Middleweight DecisionDecision R25:00 0.20 1,172→1,112 -60 1,058 – ALMMA 140: Mistrzostwa Polski MMA 2017 Amatorska Liga MMA am
9 8 Jul 201718.7 yrs W6-3 Tomasz Duda debut Middleweight KO/TKOKO/TKO R11:35 1.00 1,121→1,172 +51 1,041 – ALMMA 134: VIP Jurków Amatorska Liga MMA am
8 8 Jul 201718.7 yrs W5-3 Mariusz Pilarz debut Middleweight KO/TKOKO/TKO R10:12 1.00 1,059→1,121 +62 1,041 – ALMMA 134: VIP Jurków Amatorska Liga MMA am
7 8 Jul 201718.7 yrs W4-3 Kamil Jezutek debut Middleweight DecisionDecision R14:00 0.80 1,014→1,059 +45 1,044 – ALMMA 134: VIP Jurków Amatorska Liga MMA am
6 8 Jul 201718.7 yrs L3-3 Adrian Świczerewski debut Middleweighttitle SubArmbar R12:43 0.00 1,091→1,014 -76 1,033 – ALMMA 134: VIP Jurków Amatorska Liga MMA am
5 9 Apr 201718.5 yrs L3-2 Patryk Jóźwiak debut Middleweight DecisionDecision R26:00 0.20 1,154→1,091 -64 1,018 – ALMMA 130: Puchar Lubelszczyzny Amatorska Liga MMA am
4 9 Apr 201718.5 yrs W3-1 Maciej Boczar debut Middleweight DecisionDecision R14:00 0.80 1,138→1,154 +17 1,014 – ALMMA 130: Puchar Lubelszczyzny Amatorska Liga MMA am
3 10 Apr 201617.5 yrs W2-1 Paweł Biernat debut Heavyweighttitle SubArm Triangle Choke R13:16 1.00 1,084→1,138 +53 1,019 – ALMMA 106: Puchar Podkarpacia Amatorska Liga MMA am
2 10 Oct 201517.0 yrs W1-1 Adam Tomasik debut Light Heavyweighttitle SubAchilles Lock R11:48 1.00 1,015→1,084 +69 1,034 – ALMMA 92: Mistrzostwa Podkarpacia Amatorska Liga MMA am
1 7 Feb 201516.3 yrs L0-1 Wiktor Kupka debut Light Heavyweighttitle SubArmbar R10:29 0.00 1,080→1,015 -66 1,080 – ALMMA 73: Amatorski Puchar FEN Amatorska Liga MMA am