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Seth Niemi

Gentle Arts Dojo · Ontario

28–28
Record
50%
Submission rate
3y 3m
Career
2:30
Avg match
3.9
Avg place

Brazilian Jiu-Jitsu competitor. 56 matches across 21 events since Jul 2023, from Smoothcomp results.

#960 in Canada · #464 in Ontario

Rating over time Rating 1687−1

Oct 3, 2026·−1 · 1–2·The London Open 2026

L10 L L W W W L W W L W
2-loss streak
Top 5 best wins
OpponentTheir rating
  • 1
    Kubaren Mukunthan NEXTGEN ULTIMATE NIAGARA 2026 Event Reached Full capacity · Mar 2026
    1751
  • 2
    Nathaniel Brukson 2026 AURORA ANNUAL JIU-JITSU CHAMPIONSHIP · Apr 2026
    1745
  • 3
    Arlen Hurlburt 2024 Ontario Open NoGi + ACE Cup Gi · Oct 2024
    1693
  • 4
    Yazan ABOUD 2025 Windsor Open Jiu Jitsu Tournament · May 2025
    1604
  • 5
    Dominic Rickards 2025 Brampton BJJ In-House Tournament · Oct 2025
    1599

Opponents & match history

56 matches

Newest first, grouped by tournament. Each tournament shows its rating change and the wins we expected; tournaments rated together are one entry.

The London Open 2026Oct 3, 2026 · expected 1.2 wins 1–2−1 rating
L
Kubaren MukunthanInfinum BJJ
submission0:46
L
Niko AntoniewiczAction & Reaction MMA
points4:00
W
Felix Puley LejeuneApe Jiu Jitsu
submission3:06
Full event results →
2026 Ontario Open KIDS International Jiu Jitsu Championship - GI EditionMay 2, 2026 · expected 1.8 wins 2–1+4 rating
W
Lucian MosneanuSalvosa BJJ/Ascension
decision4:00
W
Jeesung KimOuroboros BJJ
points4:00
L
Jackson LengauerKalsamrit Martial Arts
submission0:59
Full event results →
Show 16 older tournamentsHide older tournaments
2026 AURORA ANNUAL JIU-JITSU CHAMPIONSHIPApr 18, 2026 · expected 1.1 wins 2–1+38 rating
W
Nathaniel BruksonYork Judo BJJ
points4:00
W
Elijah FardMatador MMA
points4:00
L
Cole CantwellOshawa BJJ and Fitness
submission3:00
Full event results →
NEXTGEN ULTIMATE NIAGARA 2026 Event Reached Full capacityMar 7, 2026 · expected 1.8 wins 3–0+43 rating
W
Oliver LewinToronto Jiu-Jitsu Club
points4:00
W
Oliver LewinToronto Jiu-Jitsu Club
submission3:57
–
Jackson LengauerKalsamrit Martial Arts
walkovernot counted
W
Kubaren MukunthanInfinum BJJ
decision4:00
Full event results →
2025 Ontario Provincial Jiu Jitsu ChampionshipDec 6, 2025 · expected 0.9 wins 1–1±0 rating
W
Jace CepeskoGorilla Dojo Kirkland Lake
submission1:24
L
Sebastian DuenasBattle Arts Academy, Mississauga
points4:00
Full event results →
2025 Brampton BJJ In-House TournamentOct 19, 2025 · expected 2.0 wins 2–4−2 rating
L
Jethro MerenickBrampton Brazilian Jiu-Jitsu Academy
points4:00
W
Tanner HendersonOrangeville Brazilian Jiu-Jitsu Academy
submission1:42
W
Dominic RickardsUnited BJJ
points4:00
L
Zain KhanBrampton Brazilian Jiu-Jitsu Academy
submission1:22
L
Randall ChavezFluxo Jiu Jitsu
submission1:22
L
MAX ROLIX905 Brazilian Jiu-Jitsu
submission1:15
Full event results →
The London Open 2025Oct 4, 2025 · expected 2.1 wins 2–3−10 rating
W
Soren ClelfordArmstrong Academy of Martial Arts
submission1:28
L
Victor VasilevSalvosa BJJ/Ascension
submission2:26
L
Odin DerbowkaApe Jiu Jitsu
submission1:31
L
Victor VasilevSalvosa BJJ/Ascension
points3:11
W
Soren ClelfordArmstrong Academy of Martial Arts
points4:00
Full event results →
2025 Windsor Open Jiu Jitsu TournamentMay 24, 2025 · expected 2.3 wins 3–1+28 rating
W
Yazan ABOUDApe Jiu Jitsu
submission1:31
W
Chloe RaffoulApe Jiu Jitsu
points4:00
L
Abdullah MalasApe Jiu Jitsu
submission1:05
W
Summer BanksCaique Jiu-jitsu Windsor
submission1:21
Full event results →
2025 Ontario Open KIDS International Jiu Jitsu Championship - GI EditionMay 3, 2025 · expected 0.5 wins 0–2−35 rating
L
Adam SalehOcta BJJ
submission3:58
L
Samson Legracie barra barrhaven
points4:00
Full event results →
2025 NEXTGEN NIAGARAMar 8, 2025 · expected 2.4 wins 2–3−12 rating
L
Michael Danchuk10th Planet Etobicoke, Toronto
submission2:20
L
Jonathan DaviesMamute Martial Arts Academy
submission0:12
L
Jonathan DaviesMamute Martial Arts Academy
submission0:43
W
Lio ScioreBora BJJ
submission0:29
W
Adam DavidsonAcademix Academy
submission1:59
Full event results →
2024 Ontario Provincial Jiu Jitsu ChampionshipNov 30, 2024 · expected 1.6 wins 1–2−27 rating
L
Gibson GeigerGentle Arts Dojo
decision3:00
W
Naim HaddadOcta BJJ
submission1:33
L
Michael Danchuk10th Planet Etobicoke, Toronto
submission1:24
Full event results →
2024 Ontario Open NoGi + ACE Cup GiOct 19, 2024 · expected 1.3 wins 2–1+48 rating
W
Arlen HurlburtToronto Jiu-Jitsu Club
points3:00
L
Cole CantwellOshawa BJJ and Fitness
points3:00
W
Joaquin AlvarezToronto Jiu-Jitsu Club
points3:00
Full event results →
NEXT GEN TORONTO 2024Jul 13, 2024 · expected 0.5 wins 1–1+50 rating
W
Ryleigh Di VenanzoMSJ COMBAT
submission0:22
L
Victor VasilevSalvosa BJJ/Ascension
submission1:11
Full event results →
2024 Windsor Open Jiu Jitsu TournamentMay 25, 2024 · expected 2.1 wins 2–2+1 rating
L
Yazan ABOUDApe Jiu Jitsu
points3:00
L
Gibson GeigerGentle Arts Dojo
submission
W
Sloan DeJongeUnion JJ
submission1:47
W
Rickson Van Vliethybrid training academy lakeshore
submission2:04
Full event results →
Durham ClassicJan 27, 2024 · expected 0.5 wins 0–2−57 rating
L
Braunson ValleauBig Country MMA
points3:00
L
Victor VasilevSalvosa BJJ/Ascension
submission2:48
Full event results →
2023 Ontario Open NoGi + ACE Cup GiOct 14, 2023 · expected 1.2 wins 2–0+92 rating
W
Kasper Sahaie905 Brazilian Jiu-Jitsu
decision3:00
W
Dominic RickardsUnited BJJ
decision3:00
Full event results →
Lutando Series: Summer EditionAug 26, 2023 · expected 0.6 wins 0–2−110 rating
L
Soleil EmmanouilToronto Top Team
points3:00
L
Loyal RobinsonToronto Top Team
submission1:01
Full event results →
NEXT GEN TORONTO 2023Jul 15, 2023 · expected 1.4 wins 2–0first rating
W
Oliver ChangTrillium MMA
submission2:20
W
Oliver ChangTrillium MMA
points3:00
Full event results →

Seth Niemi is a Brazilian Jiu-Jitsu competitor out of Gentle Arts Dojo. JitsDex holds 56 matches across 21 events, going back to Jul 2023 — a 28–28 record compiled from Smoothcomp tournament results. JitsDex rates Seth Niemi 1687, #960 of 3,906 kids in Canada and #464 in Ontario.

21 events · 56 matches · 4 gold · first event on record Jul 2023 · jitsdex.com

Rating 1687 · skill 1727 ± 80 · quality wins 9/8 · data as of 2026-10-24

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