Best Underground Fighting Events of 2025: Year in Review
2025 was a landmark year for underground fighting. Organizations grew, production quality improved, and several events pushed the boundaries of what unsanctioned combat could look like. From KOTS spectacles in Europe to Streetbeefs milestones in Virginia, these are the ten events that defined the year.
For the full annual retrospective, see our underground fighting 2025 year in review.
10. Top Dog FC Season 6 Finale (Moscow, December 2025)
Top Dog FC closed the year with their biggest card ever. The season finale featured tournament finals across three weight classes and a superfight between their two biggest stars. Production quality rivaled professional promotions, with drone cameras and cinematic lighting.
Highlight: The heavyweight final ended in a 15-second knockout that became the most-viewed Top Dog clip of the year.
Attendance: 3,000+ | YouTube Views: 12M+
9. Backyard Squabbles: Guns Down, Squabble Up V (Houston, September 2025)
The Texas-based promotion continued its mission of providing an alternative to street violence. The fifth installment featured their deepest card yet with 16 bouts. The community aspect remains central, with local organizations supporting the event.
Highlight: A women's bout stole the show with a third-round comeback knockout.
Attendance: 1,500+ | YouTube Views: 4M+
8. Mahatch FC Season 3 Finals (Kyiv, October 2025)
Despite ongoing challenges in Ukraine, Mahatch FC delivered an incredible card that demonstrated the resilience of the combat sports community. Their unique format of ungloved MMA in a small ring produced non-stop action across ten fights.
Highlight: The middleweight final featured a spinning back elbow knockout.
Attendance: 2,000+ | YouTube Views: 8M+
7. Strelka Season 2025 Grand Prix (Russia, July 2025)
Strelka's return to form after several quiet years proved the brand still resonates. The outdoor summer event in rural Russia featured 32 fighters in a single-elimination tournament. The raw, no-frills format reminded fans why Strelka went viral in the first place.
Highlight: An unknown 19-year-old won the entire tournament, beating four opponents in one night.
Attendance: 5,000+ | YouTube Views: 15M+
6. FPVS (Fair Park Venue Series) Championship Night (Dallas, August 2025)
FPVS elevated their production with a championship event that featured custom-built outdoor staging and professional lighting. Five title fights across five weight classes made this their most ambitious card.
Highlight: The welterweight championship went five rounds in one of the year's best fights.
Attendance: 2,500+ | YouTube Views: 6M+
5. Holmgang Denmark (Copenhagen, June 2025)
The Scandinavian bare knuckle promotion delivered a sold-out event in Copenhagen that featured fighters from eight countries. The Viking-themed production and brutal matchups created an atmosphere unlike anything else in combat sports.
Highlight: A Danish hometown favorite won the main event by knockout, sending the crowd into a frenzy.
Attendance: 1,800 (sold out) | YouTube Views: 5M+
4. Streetbeefs Championship Night 2025 (Harrisonburg, VA, November 2025)
Streetbeefs' annual championship event was their best yet. Chris "Scarface" Wilson curated a card featuring the channel's biggest rivalries and most skilled fighters. The event was covered by mainstream media outlets for the first time.
Highlight: The main event championship featured a five-round war that had YouTube commenters calling it "the best Streetbeefs fight ever."
Attendance: 800+ | YouTube Views: 10M+
Full event coverage: Streetbeefs Championship Night 2025
3. KOTS: Unrivaled (Netherlands, April 2025)
KOTS continued to set the standard for production quality in the underground space. "Unrivaled" featured their signature circular pit, professional commentary, and a card stacked with European and American talent. The main event delivered a knockout-of-the-year candidate.
Highlight: The co-main event featured a comeback KO after a fighter was dropped in the first round.
Attendance: 2,500+ | YouTube Views: 18M+
Event recap: KOTS Unrivaled
2. UUF (Underground Ultimate Fighting) Invitational (Location undisclosed, March 2025)
UUF's invite-only event brought together fighters from multiple underground organizations for a cross-promotional card. The mystery surrounding the location and the quality of matchmaking created enormous buzz. The event proved that underground organizations can collaborate effectively.
Highlight: A Streetbeefs veteran defeated a Top Dog FC regular in the main event.
Attendance: 500 (invite only) | YouTube Views: 9M+
1. KOTS: Blood Money (Amsterdam, September 2025)
The biggest underground fighting event of 2025. KOTS pulled out all the stops with their largest venue, biggest prize pool, and deepest card. Twelve fights featuring talent from across Europe, Russia, and the Americas. The production was cinema-quality, and the fights delivered violence that matched the spectacle.
Highlight: The main event featured an overtime round that ended with a devastating body shot knockout. The losing fighter had to be carried from the pit.
Attendance: 3,500+ | YouTube Views: 25M+
Event recap: KOTS Blood Money
2025 by the Numbers
| Metric | 2024 | 2025 | Growth |
|---|---|---|---|
| Major underground events | 45 | 68 | +51% |
| Combined YouTube views | 180M | 310M | +72% |
| Active organizations | 25 | 38 | +52% |
| Countries with events | 12 | 19 | +58% |
Watch 2025's Best Moments
YouTube Channels for the organizations that defined 2025:
- KOTS -- home of Blood Money and Unrivaled
- Top Dog FC -- Season 6 highlights
- Streetbeefs -- Championship Night footage
- Strelka -- Grand Prix content
- Mahatch FC -- Season 3 Finals
- Backyard Squabbles -- Guns Down, Squabble Up series
Featured Videos:
- Top Dog Knockouts Compilation -- including the 15-second heavyweight KO
- Strelka Petrantsov -- the Strelka format at its best