Alexey Oleynik is a Ukrainian-born Russian mixed martial artist and combat sambo fighter currently signed with the Ultimate Fighting Championship, competing in their heavyweight division. He began his professional fighting career in 1997, and is a veteran of M-1 Global, ProFC and IAFC and has competed for Bellator, KSW and YAMMA Pit Fighting. He is the only fighter to win a UFC fight via Ezekiel choke, and has done so twice. Oleynik also holds the record for most Ezekiel choke wins in MMA competition, with twelve. As of October 26, 2020, he is #10 in the UFC heavyweight rankings.