KSW Light Heavyweight Champion

Narkun returned to face Croatian Goran Reljic at KSW 29. Narkun was defeated via majority decision. In 2015, Narkun defeated Karol Celinski via first-round rear-naked choke before being given a rematch with Reljic, who had since defeated Attila Végh to become KSW Light Heavyweight Champion, at KSW 32. Narkun won via first-round knockout, becoming the KSW Light Heavyweight Champion.

After defeating Reljic in their rematch for the belt, Narkun had his first title defense against Brazilian Cassio "Jacare" de Oliveira at KSW 34 in early 2016, and then defeated Sokoudjou for his second defense in October of that year. For his third defense, Narkun defeated Marcin Wojicik via triangle choke with just a second left in the first round at KSW 39: Colosseum.

At KSW 42, Narkun prepared for a non-title bout against Mamed Khalidov, the former KSW Middleweight Champion. The pair met at a Catchweight of 203 lbs. After getting knocked down twice in the first round, Narkun was able to regroup, he won via triangle choke submission in the third round; breaking Khalidov's 15-fight unbeaten streak.^[4] The pair met again at KSW 46 on December 1, 2018. Narkun won again, this time via unanimous decision after three rounds.^[5]

Narkun next challenged KSW Heavyweight Champion and former UFC veteran Phil De Fries for his title at KSW 47 on March 23, 2019. Narkun lost via unanimous decision.^[6]

Narkun next defended his Light Heavyweight Championship at KSW 50: London against Przemysław Mysiala, winning via guillotine choke submission in the first round.^[7]

Narkun faced Ivan Erslan at KSW 56: Polska vs. Chorwacja on November 14, 2020.^[8] He defended his title, winning the fight via second round submission.^[9]

Narkun rematched Phil De Fries on April 24, 2021 at KSW 60: De Fries vs. Narkun 2 for the KSW Heavyweight Championship. The pair previously met on March 23, 2019 in the main event at KSW 47: The X-Warriors, where De Fries defeated Narkun by unanimous decision and defended his KSW heavyweight title.^[10] He lost the bout in the second round via ground and pound.^[11]

Narkun faced Ibragim Chuzhigaev on January 15, 2022 at KSW 66: Ziółkowski vs. Mańkowski.^[12] Narkun lost via unanimous decision, ending his reign as the Light Heavyweight champion.^[13]

Post Title Reign

In his first appearance after losing the belt, Narkun faced Henrique da Silva on October 14, 2022 at KSW 75: Ruchała vs. Stasiak. After dominating on the ground in the first round, Narkun was knocked out via a front kick 28 seconds into the second round.^[14]