Damian Stasiak

Background Stasiak began training in karate at the age of six, later earning his black belt (International Traditional Karate Federation), and won multiple World Championships in individual Kumite. Stasiak is also accomplished in Brazilian jiu-jitsu, holding the rank of brown belt.

Mixed martial arts career

Early career Stasiak made his professional debut in November 2011 where he competed primarily in regional promotions across the Eastern Europe, including stints in M-1 Global and BAMMA, where he compiled a record of 8—2 before signing with the UFC in the spring of 2015.

Ultimate Fighting Championship He made his debut against Yaotzin Meza at UFC Fight Night 64 on April 11, 2014. He lost the back and forth fight by unanimous decision.

Stasiak was briefly linked to a fight with Erik Pérez on November 21, 2015, at The Ultimate Fighter Latin America 2 Finale. However, Stasiak was removed from the bout for undisclosed reasons in mid-October and was replaced by Taylor Lapilus.

Stasiak next faced Filip Pejić on April 10, 2016, at UFC Fight Night 86. He won the fight via submission in the first round.

Stasiak faced Davey Grant on October 8, 2016, at UFC 204. He won the fight via submission in the third round.

Stasiak faced Pedro Munhoz on May 28, 2017, at UFC Fight Night 109. He lost the fight by unanimous decision.

Stasiak faced Brian Kelleher on October 21, 2017, at UFC Fight Night 118. He lost the fight via technical knockout in the third round. This fight earned him the Fight of the Night award.

Stasiak met promotional newcomer Liu Pingyuan on July 22, 2018, at UFC Fight Night 134. He lost the fight via unanimous decision.

Stasiak was released by the UFC in September 2018.

KSW After one victory in the regional circuit, Stasiak signed with KSW and faced Antun Račić for the inaugural KSW Bantamweight Championship at KSW 51 on November 9, 2019. Stasiak lost the grappling-heavy contest via unanimous decision.

Stasiak made his sophomore appearance in the organization against Patryk Surdyn at KSW 55 on October 10, 2020. He won the fight via second-round submission.

Stasiak returned to featherweight and faced Andrey Lezhnev on June 5, 2021, at KSW 61. He submitted Lezhnev in the first round via triangle choke.

Stasiak faced Lom-Ali Eskijew on December 18, 2021, at KSW 65: Khalidov vs. Soldić. He lost the bout via unanimous decision.

Stasiak faced Robert Ruchała on October 14, 2022, at KSW 75: Ruchała vs. Stasiak. He lost the close bout via split decision.

Stasiak faced Pascal Hintzen on July 15, 2023, at KSW 84: De Fries vs. Bajor. He won the bout via triangle choke in the first round.

Stasiak faced Adam Soldaev on January 20, 2024 at KSW 90: Wrzosek vs. Vitasović, getting knocked out in the second round.

Stasiak faced Michał Domin in his retirement fight on June 14, 2025 at KSW 107: De Fries vs Wrzosek. He won the fight via unanimous decision. After the fight he announced his retirement.

Championships and accomplishments Ultimate Fighting Championship Fight of the Night (One time) vs. Brian Kelleher