Piotr Niedzielski

Piotr Niedzielski (born January 12, 1991) is a Polish professional mixed martial artist. He currently competes in the Welterwight division. He was the inaugural Babilon MMA Lightweight champion. He has previously competed on Bellator MMA and UAE Warriors.

Professional career Early career Niedzielski made his professional debut on April 25, 2010, against Mikołaj Żukowski. Niedzielski won the fight via a first-round submission.

Slugfest MMA After accumulating a career record of 2–1, Niedzielski made his debut under Slugfest MMA on December 13, 2014, against Wojciech Marjański. Niedzielski won the fight via a second-round submission.

Following a one-off fight on the regionals, he returned to Slugfest on June 6, 2015, against Michal Mokrý. Niedzielski won the fight via a Unanimous Decision.

International fights After another one-off fight on the regionals, Niedzielski fought in his first fight in a different country. He faced Luka Jelčić on April 9, 2016, for the vacant Total Extreme Fighting Championship Lightweight championship. Niedzielski lost the fight via a first-round submission.

His next fight came on August 27, 2016, against Valeriu Mircea. Niedzielski lost the fight via a Unanimous Decision. Despite the loss, he earned his first career Fight of the Night bonus.

Return to Slugfest MMA He returned to Slugfest MMA on December 10, 2016, against Martin Hajtmar. Niedzielski won the fight via a second-round TKO.

Return to regionals His next fight came on February 18, 2017, against Kacper Koziorzębski in his hometown of Poznań. Niedzielski won the fight via a first-round TKO.

His next fight came on April 1, 2017, against Alan Langer. Niedzielski lost the fight via a Unanimous Decision.

His next fight came on October 14, 2017, against Saulius Bucius. Niedzielski won the fight via a Unanimous Decision.

Babilon MMA Niedzielski made his debut under Babilon MMA on June 8, 2018, against Mateusz Zawadzki. Niedzielski won the fight via a second-round TKO.

After a one-off fight on the regionals, he returned to Babilon MMA on January 25, 2019, against Oleksandr Horshechnik. Niedzielski won the fight via a Unanimous Decision.

After another one-off fight on the regionals, he returned to Babilon MMA on August 16, 2019, against Uelliton Silva. Niedzielski won the fight via a Unanimous Decision.

His next fight came on February 7, 2020, against Marcos Schmitz in a title eliminator. Niedzielski won the fight via a first-round submission.

Babilon MMA Lightweight Champion Niedzielski faced Ivan Vulchin for the inaugural Babilon MMA Lightweight championship on September 11, 2021. Niedzielski won the fight via a second-round knockout, winning his first career championship in the process.

Bellator MMA On March 12, 2022, it was announced that Niedzielski had signed a contract with Bellator MMA. In his debut, he faced Pedro Carvalho on May 6, 2022, at Bellator 280. Niedzielski won the fight via a Split Decision.

His next fight came on February 25, 2023, against Richie Smullen at Bellator 291. Niedzielski lost the fight via a Split Decision.

His next fight came on May 12, 2023, against Yves Landu at Bellator 296. Before the fight, Niedzielski missed weight by 1.2 lbs. Niedzielski lost the fight via a Unanimous Decision.

His final fight under Bellator came on September 23, 2023, against Khasan Magomedsharipov at Bellator 299. He took this fight on eight days notice, as Khasan's original opponent, Martin McDonough, withdrew. Before the fight, Niedzielski missed weight for a second time, this time by 2.8 lbs. Due to this, the bout proceeded as a catchweight, and Niedzielski was fined 20 percent of his purse. Niedzielski lost the fight via a second-round submission.

CaveMMA Following his stint in Bellator MMA, Niedzielski returned to his native Poland where he competed under local federation CaveMMA. He faced Levan Kirtadze on March 1, 2024. Niedzielski won the fight via a Split Decision.

War MMA Niedzielski made his debut under Spain-based federation War MMA on August 24, 2024, against Felipe Maia. Niedzielski won the fight via a first-round submission.

His next fight came on April 5, 2025, in a rematch against Felipe Maia. Niedzielski won the fight via a first-round knockout.

UAE Warriors Niedzielski made his debut under UAE Warriors on June 13, 2025, against Vladyslav Rudnev. Niedzielski lost the fight via a Unanimous Decision.

King's Arena Niedzielski fought on the inaugural King's Arena event which took place on September 13, 2025. He faced Giorgi Esiava. Niedzielski won the fight via a Unanimous Decision.

Shlemenko Fighting Championship On November 13, 2025, it was announced that Niedzielski will be facing Andrey Koreshkov under Russian federation Shlemenko Fighting Championship on December 13, 2025, with Niedzielski being the first Polish fighter to compete on Russian soil in three years. Niedzielski lost the fight via a second-round TKO.

Return to King's Arena Niedzielski returned to King's Arena on February 7, 2026, where he faced Levan Kirtadze in a rematch after their last bout 2 years prior. Niedzielski won the fight via a Split Decision.

Fight Nation Championship Niedzielski made his debut under Croatian federation Fight Nation Championship on May 30, 2026, against Marko Bojković. Niedzielski lost the fight via a Unanimous Decision.

Championships and accomplishments Mixed martial arts Babilon MMA Babilon MMA Lightweight Champion (One time; former) World Freefight Challenge Fight of the Night (One time)

Mixed martial arts record Loss

Marko Bojković Decision (unanimous) FNC 31

Belgrade, Serbia Win

Levan Kirtadze Decision (split) King's Arena 2

Olsztyn, Poland Loss

Andrey Koreshkov TKO (punches) Shlemenko FC 12

Omsk, Russia Win

Giorgi Esiava Decision (unanimous) King's Arena 1

Poznań, Poland Loss

Vladyslav Rudnev Decision (unanimous) UAE Warriors 60

Abu Dhabi, United Arab Emirates Win

Felipe da Silva Maia TKO (body kick) World Athlete Radical 5

Cartagena, Spain Win

Felipe da Silva Maia Submission (guillotine choke) World Athlete Radical 3

Benidorm, Spain Win

Levan Kirtadze Decision (split) CaveMMA 4

Jastrzębie-Zdrój, Poland Loss

Khasan Magomedsharipov Submission (arm-triangle choke) Bellator 299

Dublin, Ireland Loss

Yves Landu Decision (unanimous) Bellator 296

Paris, France Loss

Richie Smullen Decision (split) Bellator 291

Dublin, Ireland Win

Pedro Carvalho Decision (split) Bellator 280

Paris, France Win

Ivan Vulchin KO (punch) Babilon MMA 24

Żyrardów, Poland Win

Marcos Schmitz Submission (guillotine choke) Babilon MMA 12

Łomża, Poland Win

Uelliton Silva Decision (unanimous) Babilon MMA 9

Międzyzdroje, Poland Win

Ričardas Vaičys KO (body kick) Grupa MTP: Poznań Fight Show Night

Poznań, Poland Win

Oleksandr Horshechnik Decision (unanimous) Babilon MMA 7

Żyrardów, Poland Win

Mateusz Strzelczyk Submission (guillotine choke) Gala Sportów Walki 9

Międzychód, Poland Win

Mateusz Zawadzki TKO (body kick and punches) Babilon MMA 4

Ełk, Poland Win

Saulius Bucius Decision (unanimous) Gala Sportów Walki 8

Międzychód, Poland Loss

Alan Langer Decision (unanimous) Spartan Fight 7

Chorzów, Poland Win

Kacper Koziorzębski TKO (punches) X Fights Series: Poznań Fight Night 2

Poznań, Poland Win

Martin Hajtmar TKO (doctor stoppage) Slugfest 9

Września, Poland Loss

Valeriu Mircea Decision (unanimous) World Freefight Challenge 20

Bad Vöslau, Poland Loss

Luka Jelčić Submission (rear-naked choke) Total Extreme Fighting 1

Dublin, Ireland Win

Péter Akors Váradi Submission (arm-triangle choke) Pawel Kaminski Memorial 4

Gniezno, Poland Win

Michal Mokrý Decision (unanimous) Slugfest 4

Murowana Goślina, Poland Win

Marcin Mazurek Submission (guillotine choke) Arena Berserkerów 7

Szczecin, Poland Win

Wojciech Marjański Submission (guillotine choke) Slugfest 2

Września, Poland Win

Sergiusz Uzarek Decision (majority) Pawel Kaminski Memorial 3

Gniezno, Poland Loss

Kamil Gniadek Decision (unanimous) Arena Berserkerów 6

Police, Poland Win

Mikołaj Żukowski Submission (guillotine choke) Red Dragon Poznań: K-1 Against Drugs

Luboń, Poland