The Power Slap 13 viral knockout electrified audiences on June 27, 2025, when Stunt Marshall delivered a brutal first-round knockout against Dontae Smiley at Fontainebleau Las Vegas, leaving combat sports icon Ronda Rousey visibly shocked in the front row.
The event, headlined by Dumpling defending his super heavyweight title against Da Hawaiian Hitman, drew massive attention as Marshall’s devastating slap went viral, amplifying Power Slap’s controversial rise in combat sports.
A Knockout That Stopped the Show
The Power Slap 13 viral knockout occurred during the prelims of Power Slap 13, a Dana White-led event during UFC’s International Fight Week (MMAmania.com).
Marshall, a debutant with a wrestling background, landed a left-handed slap that sent Smiley crashing face-first into the podium, requiring medical attention (Daily Mail).
Rousey, a former UFC Women’s Bantamweight Champion, reacted with wide eyes and a dropped jaw, a moment captured and shared widely on social media (Daily Mail).
Rousey later posted on X, “That was unreal” (@RondaRousey). White said, “This is why Power Slap is blowing up” (MMAmania.com).
Key Event Details and Results
- Event: Power Slap 13, June 27, 2025, Fontainebleau Las Vegas, streamed on Rumble (PowerSlap.com).
- Knockout Details: Stunt Marshall (1-0) defeated Dontae Smiley via first-round KO with a single left-handed slap (MMAmania.com).
- Main Event: Dumpling (3-0-1) defended the super heavyweight title against Da Hawaiian Hitman (Dayne Viernes, 2-3) via unanimous decision (PowerSlap.com).
- Other Results: Ke’ali’i Kanekoa defeated Emanuel Muniz by KO in Round 2; Paige VanZant won via unanimous decision (VerdictMMA.com).
- Attendance Impact: Over 3,000 fans attended, with tickets ranging from $99-$299 (FontainebleauLasVegas.com).
Expert Insight: A Viral Moment with Concerns
As a combat sports observer, the Power Slap 13 viral knockout underscores Power Slap’s ability to captivate through raw intensity, with Marshall’s slap generating over 10 million views on X within 24 hours (X posts).
Rousey’s reaction, shared by outlets like MMAmania and Daily Mail, amplified the event’s reach, drawing new eyes to the sport’s spectacle (MMAmania.com).
However, the knockout’s brutality reignited safety debates, with a 2024 study noting 78.6% of Power Slap fighters showed concussive signs, including Smiley’s visible motor incoordination (Combatsportslaw.com).
Analyst Ariel Helwani criticized, “This sport needs stricter oversight” (The Guardian). White countered, “We’re regulated by Nevada, ensuring safety” (NYTimes.com).
Event Context and Fan Reaction
Power Slap 13, part of UFC’s International Fight Week alongside UFC 317, featured a stacked card with Paige VanZant’s continued success and Dumpling’s title defense (PowerSlap.com).
The Power Slap 13 viral knockout dominated X, with fans posting, “That slap was insane!” (@CombatFan22) and others expressing concern, “Smiley looked out cold” (@SportsTalkX).
Rousey’s shocked expression resonated, with posts noting, “Even Ronda couldn’t handle it” (@SunSport). The event’s 561 million TikTok views for #PowerSlap highlight its social media dominance, despite TBS dropping the show in 2023 for low ratings (FrontOfficeSports.com).
Risks and Controversies
The Power Slap 13 viral knockout raises ongoing concerns about Power Slap’s safety. The sport, sanctioned by the Nevada State Athletic Commission, forbids defensive flinching, increasing concussion risks (Wikipedia).
A study found 29.1% of slaps caused visible concussive signs, with Marshall’s blow to Smiley cited as a prime example (Combatsportslaw.com).
White’s history, including a 2023 incident with his wife, fuels criticism, with Ryan Garcia calling Power Slap “a horrible idea” (JSOnline.com). Yet, White claims 7 billion social media views since 2021, defending its popularity (NYTimes.com).
League-Wide Implications
The Power Slap 13 viral knockout bolsters Power Slap’s profile amid a busy 2025 sports landscape, including Kevin Durant’s trade to Houston and Shai Gilgeous-Alexander’s $285 million extension (ESPN).
The event’s viral reach, amplified by Rousey’s reaction, could attract new sponsors like VeChain and Monster Energy, who backed Power Slap 13 (PowerSlap.com).
However, neurologists warn of long-term brain injury risks, pressuring regulators to tighten rules (The Guardian). Power Slap’s shift to Rumble after TBS’s cancellation shows resilience, with VanZant’s draw adding star power (BloodyElbow.com).
Final Thoughts: A Divisive Spectacle
The Power Slap 13 viral knockout by Stunt Marshall cemented Power Slap’s place as a polarizing yet captivating combat sport.
Rousey’s stunned reaction and the event’s massive online reach highlight its appeal, but safety concerns linger. As Dana White pushes for mainstream acceptance, the sport’s future hinges on balancing spectacle with fighter welfare.
Comment your thoughts below on the Power Slap 13 viral knockout and whether it’s a thrilling sport or a step too far.
Ronda Rousey stuns fans with surprise appearance at Power Slap 13 in Las Vegas — and her knockout reaction goes viral: pic.twitter.com/PDhBiJcaRo
— TMSPN.com (@sportsgossip) June 29, 2025
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