A great night of fights took place last night in Costa Mesa, CA at the OC fairgrounds as M-1 Global took over ‘The Hanger’ for their Challenge 26 card. In what may perhaps be the KO of the year, Tyson ‘The Anti-hero’ Jeffries pulled off a devastating spinning back-fist on Arthur Guseinov that put the Russian to sleep on the canvas (KO at 1:44, slow motion at 2:50).