Daniel Omielańczuk

Early career

Omielańczuk made his professional debut in 2009, competing primarily in regional promotions across the Eastern Europe, including KSW, where he compiled a record of 15–3 before signing with the UFC in the spring of 2013.^[3]

Ultimate Fighting Championship

Omielańczuk made his promotional debut against fellow newcomer Nandor Guelmino on September 21, 2013, at UFC 165.^[4] After a back and forth first two rounds, Omielańczuk won the fight via knockout in the third round.^[5]

Omielańczuk faced Jared Rosholt on April 19, 2014, at UFC Fight Night 39.^[6] Rosholt defeated Omielańczuk via unanimous decision.^[7]

Omielańczuk was expected to face Soa Palelei on November 8, 2014, at UFC Fight Night 55.^[8] However, Omielańczuk was forced to pull out of bout with a broken thumb and was replaced by Walt Harris.^[9]

Omielańczuk faced Anthony Hamilton on April 11, 2015, at UFC Fight Night 64.^[10] Omielańczuk lost the fight by unanimous decision.^[11]

Omielańczuk was expected to face Konstantin Erokhin on July 18, 2015, at UFC Fight Night 72.^[12] However, Erokhin pulled out of the fight in late June citing an injury and was replaced by promotional newcomer Chris de la Rocha.^[13] He won the fight via TKO in the first round.^[14]

Omielańczuk faced Jarjis Danho on February 27, 2016, at UFC Fight Night 84.^[15] He won the fight via technical majority decision after Danho was hit with an inadvertent groin strike in the third round that rendered him unable to continue.^[16]

Omielańczuk next faced Alexey Oleynik on July 13, 2016, at UFC Fight Night 91.^[17] He won the fight via majority decision.^[18]

Omielańczuk faced Stefan Struve on October 8, 2016, at UFC 204.^[19] He lost the back and forth fight via submission in the second round.^[20]

Omielańczuk faced Timothy Johnson on March 18, 2017, at UFC Fight Night 107.^[21] He lost the back and forth fight by split decision.^[22]

Omielańczuk faced Curtis Blaydes on July 8, 2017, at UFC 213.^[23] He lost the fight by unanimous decision.^[24]

Absolute Championship Berkut

After his third consecutive loss, Omielanczuk was released from the UFC. He later signed with Absolute Championship Berkut, competing against American Bobby Brents at ACB 83: Baku in 2018. He won via first-round submission. After picking up a unanimous decision win in the regional kickboxing circuit, Omielanczuk returned to MMA to face Amir Aliakbari at ACB 89: Krasnodar in September 2018. He was defeated via unanimous decision.

Since the loss to Aliakbari, Omielanczuk has won his last four fights pushing him to 5–1 after leaving the UFC. He fought for the vacant ACA Heavyweight Championship against Tony Johnson at ACA 114: Omielańczuk vs. Johnson. He lost the fight by KO in the first round, marking the first time he has ever lost by strikes.^[25]

Omielańczuk faced Daniel James on April 23, 2021, at ACA 122. He won the bout via unanimous decision.^[26]

Omielańczuk faced Evgeniy Goncharov on September 11, 2021, at ACA 128. He lost the bout via TKO in the third round.^[27]

Omielańczuk faced Adam Bogatyrev on February 26, 2022, at ACA 136: Bukuev vs Akopyan. He lost the bout via unanimous decision.^[28]

Konfrontacja Sztuk Walki

Omielańczuk faced Ricardo Prasel at KSW 70 on May 28, 2022. He lost the bout via ankle lock in the first round.^[29]

Omielańczuk faced Michal Martínek on October 14, 2022, at KSW 75: Ruchała vs. Stasiak. He controversially won via split decision,^[30] with KSW paying Martinek his show money + his contractual bonus and, upon an official appeal from Martinek's Team submitted, a full independent review of the decision was undertaken.^[31]

Omielańczuk faced Michał Kita on February 25, 2023, at KSW 79, losing the bout via ground and pound TKO in the third round.^[32]