Yaroslav Amosov (born 9 September 1993) is a Ukrainian mixed martial artist who currently competes in the Welterweight division.

He began to actively engage in combat sambo at the age of fifteen at the initiative of his stepfather, trained at the Kyiv club "Hermes" under the guidance of coaches Fedor Mykolayovych Seredyuk and Vadym Mykhailovych Korytny.

In September 2014, he became the champion of Eurasia in professional combat sambo, defeating the experienced Russian fighter Shamil Zavurov in the final with a suffocating reception.

[6] In December of that same year, Amosov again came in third place against Aliskerov in World Combat Sambo Federation sanctioned competition that was held in Moscow.

[9] In 2017, Amosov made two successful defences of the Tech-Krep FC welterweight title against Diogo Cavalcanti and Nathan Oliveira.

Bellator announced they had signed Yaroslav Amosov to the promotion following an undefeated run of 19 fights which only included two decisions.

[15] Amosov then faced three-time NCAA Division I Wrestling Champion from Penn State Ed Ruth on 21 February 2020 at Bellator 239.

[24][25] After being unable to fight for all of 2022 due to the war, Amosov returned to defend his title in a rematch against interim champion Logan Storley on 25 February 2023, at Bellator 291.

[31] After the liberation of his hometown Irpin from the battle over the town, Amosov published a video of himself rescuing the Bellator Welterweight Champion belt, which was hidden at his mother's home.