Mairbek Vakhaevich Taisumov (Russian: Майрбек Вахаевич Тайсумов; born August 8, 1988) is a Russian-born Austrian mixed martial artist.

A professional mixed martial artist since 2007, Taisumov has previously competed in the Ultimate Fighting Championship and M-1 Global.

[10] Taisumov submitted Serhiy Adamchuk in the first round on July 22, 2010, to win the M-1 Selection 2010: Eastern Europe Tournament.

[11] Taisumov was poked in the eye by Artem Damkovsky in the third round of a M-1 Global Lightweight Championship bout on October 28, 2010, and lost via doctor stoppage.

[20] In his final M-1 Global bout, Taisumov submitted Artem Damkovsky in the third round of a rematch on November 30, 2013, at M-1 Challenge 44.

[23] Tibau pulled out of the bout due to a knee injury and was replaced by Michel Prazeres, who won a dominant unanimous decision.

[24] Taisumov beat newcomer Marcin Bandel by first-round TKO on October 4, 2014, at UFC Fight Night 53.

[26] Cabral pulled out of the fight due to a knee injury and was replaced by promotional newcomer Anthony Christodoulou, who Taisumov knocked out in the second round.

[36] However, Taisumov was removed from the fight during the week before the event over reported visa issues and was replaced by promotional newcomer Michael McBride.

[47] At weigh-ins, Taisumov weighted five pounds over the lightweight non-title fight limit of 156 and was fined 40% of his purse to Green.

[49] On April 11, 2019, it was reported that USADA issued a six-month suspension for testing positive of stanozolol metabolites in an in-competition sample collected on September 15, 2018, at UFC Fight Night 136.

USADA and World Anti-Doping Agency (WADA) determined the stanozolol metabolites were found from contaminated dietary supplements he digested.