Mar 22, 2025; London, England, United Kingdom; Leon Edwards (red gloves) fights against Sean Brady (blue gloves) during UFC Fight Night at O2 Arena. Mandatory Credit: Peter van den Berg-Imagn Images
Every fighter’s career follows a different trajectory in the brutal world of MMA. Some reach championship heights and maintain their dominance for years. Others experience meteoric rises only to watch their careers crumble with devastating speed. The UFC is unforgiving to those who falter even slightly at the elite level.
Looking back at 2025, several once-dominant fighters saw their careers take alarming downward spirals. These weren’t just minor setbacks or unlucky losses. These were complete collapses that left fans wondering what happened to the warriors they once admired. Let’s examine the five most dramatic career downfalls that defined this year in the Octagon.
5. Marvin Vettori
Marvin Vettori entered 2025 hoping to bounce back from previous setbacks and re-establish himself as a middleweight contender. Instead, ‘The Italian Dream’ experienced his worst year as a professional fighter. Vettori went 0-3 in 2025, losing every single fight by unanimous decision without showing any signs of competitive fire.
His downfall began in March when Roman Dolidze defeated him via unanimous decision at UFC Vegas 104. That loss stung because Vettori had previously beaten Dolidze in their first encounter. Then came July, when Brendan Allen outworked him at UFC 318 in another clear decision loss. Vettori closed out his disastrous year in December, dropping a unanimous decision to Brunno Ferreira at UFC 323.The Italian’s record now sits at a concerning 19-10-1 overall.
4. Beneil Dariush
Beneil Dariush’s career trajectory tells a heartbreaking story of what could have been. From 2019 to 2022, ‘Benny’ went on an incredible eight-fight winning streak that should have earned him a lightweight title shot. The UFC never gave him that opportunity despite his consistent excellence. Now his career has spiraled dramatically in the opposite direction.
His last four fights paint a grim picture. In December 2023, Arman Tsarukyan knocked him out in just 64 seconds. Then Charles Oliveira stopped him via first-round TKO at UFC 289 in June 2023. Dariush managed one win against Renato Moicano in June 2025, but that brief light disappeared quickly. At UFC 322 in November 2025, Benoit Saint-Denis knocked him unconscious in just 16 seconds of the first round, with his record now at 23-7-1.
Three knockout losses in his last four fights represents a catastrophic decline for someone once knocking on the championship door. At 36 years old, the Iranian-American fighter faces serious questions about his chin’s durability and whether continuing makes sense.
3.Colby Covington
Colby Covington built his career on relentless pressure, championship-level cardio, and non-stop trash talk. ‘Chaos’ seemed destined for welterweight dominance despite falling short in multiple title challenges. But 2024-2025 revealed that Covington’s best days are firmly behind him, and the decline has been swift and merciless.
Looking at his last four fights shows the full extent of his downfall. He beat Jorge Masvidal via unanimous decision at UFC 272 in March 2022. Then came nearly two years away from competition before returning. Covington challenged Leon Edwards for the welterweight title at UFC 296 in December 2023, losing by unanimous decision. Most recently, Joaquin Buckley stopped him via doctor stoppage TKO due to a cut in December 2024.
The 36-year-old now sits at 17-5 overall and ranked #14 in the welterweight division. His trash-talking persona once sold fights and generated interest. Now it rings hollow without the performances to back it up.
2. Leon Edwards
Leon Edwards’ fall from grace might be the most shocking on this entire list. ‘Rocky’ captured the welterweight championship by knocking out Kamaru Usman with a stunning head kick at UFC 278 in August 2022. He successfully defended that title twice against Usman and Colby Covington. Then everything collapsed in devastating fashion.
Edwards’ last three fights show complete career implosion. After beating Covington in December 2023, he lost the title to Belal Muhammad via unanimous decision at UFC 304 in July 2024. That ended his nine-year unbeaten streak. Things got worse in March 2025 when Sean Brady submitted him with a guillotine choke in the fourth round. Then Carlos Prates knocked him out cold in the second round at UFC 322 in November 2025.
Three consecutive losses, including his first-ever knockout defeat and first submission loss via finish, destroyed everything Edwards built. The 34-year-old Birmingham native now sits at 22-6 overall and ranked #9 in the welterweight division. That rapid descent qualifies as one of 2025’s most dramatic downfalls.
1. Israel Adesanya
Israel Adesanya’s career downfall represents the most significant collapse in the UFC during 2025. ‘The Last Stylebender’ once dominated the middleweight division with technical striking brilliance and championship swagger. His anime-inspired walkouts and flashy personality made him one of the sport’s biggest stars. Now that star has completely burned out.
Examining his last four fights reveals total career destruction. He knocked out Alex Pereira to regain the middleweight title at UFC 287 in April 2023. That represents his final victory. Sean Strickland shockingly upset him via unanimous decision at UFC 293 in September 2023, taking his title. Dricus du Plessis submitted him with a face crank in the fourth round at UFC 305 in August 2024, marking his first-ever submission loss. Then Nassourdine Imavov knocked him out via TKO in just 30 seconds of the second round at UFC Fight Night in February 2025.
Adesanya is now 1-4 in his last five fights with three consecutive devastating losses. The 36-year-old Nigerian-New Zealander’s record stands at 24-5 overall. He’s ranked #6 in the middleweight division, far from the championship glory he once enjoyed as a two-time titleholder. Retirement conversations dominate discussions about his future rather than title comeback talk. From pound-for-pound king to seriously damaged goods in less than two years, that’s the definition of career downfall !
(Image Credit: Peter van den Berg – Imagn Images)
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I am a dedicated MMA and Boxing content writer at The Playoffs. I was instantly hooked on MMA after watching the fight between Lyoto Machida vs. Gegard Mousasi back in 2014, and since then, i have been an avid writer with a deep love for the sport and its techniques, providing readers with a thorough understanding of the sport. My favorite aspect of working at The Playoffs is the creative freedom it provides. The diverse range of topics, from listicles and SEO to news articles, keeps me engaged and motivates me to continuously improve my skills! I aim to capture the excitement of the combat sports world in my writing, acting as the middleman between fighters and their die-hard fans. It is kind of like a referee, but with words!
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