The fight lasted all three rounds.
Barsole won by unanimous decision.
The fight took place in Honolulu.
23-year-old Mikhailov suffered his first defeat in Bellator.
On account of the Russian two victories in the promotion.
Earlier, Fedor Emelianenko spoke about the conflict with the American Corey Anderson after the fight with Vadim Nemkov at the Bellator 277 tournament.