▁compet ing ▁in ▁the ▁B ant am weight ▁division ▁of ▁the ▁Ult imate ▁Fight ing ▁Championship . ▁A ▁professional ▁compet itor ▁since ▁ 2 0 1 1 , ▁he ▁formerly ▁competed ▁for ▁M - 1 ▁Global , ▁B AM MA , ▁and ▁Ab solute ▁Championship ▁Ber k ut . ▁ ▁Background ▁St as iak ▁began ▁training ▁in ▁kar ate ▁at ▁the ▁age ▁of ▁six , ▁later ▁ear ning ▁his ▁black ▁bel t ▁( Intern ational ▁Trad itional ▁Kar ate ▁Federation ), ▁and ▁won ▁multiple ▁World ▁Championships ▁in ▁individual ▁K um ite . ▁St as iak ▁is ▁also ▁accomplished ▁in ▁Brazil ian ▁j iu - j its u , ▁holding ▁the ▁rank ▁of ▁brown ▁bel t . ▁ ▁M ixed ▁mart ial ▁arts ▁career ▁ ▁Early ▁career ▁St as iak ▁made ▁his ▁professional ▁debut ▁in ▁November ▁ 2 0 1 1 ▁where ▁he ▁competed ▁primarily ▁in ▁regional ▁prom ot ions ▁across ▁the ▁Eastern ▁Europe , ▁including ▁st ints ▁in ▁M - 1 ▁Global ▁and ▁B AM MA , ▁where ▁he ▁compiled ▁a ▁record ▁of ▁ 8 — 2 ▁before ▁signing ▁with ▁the ▁U FC ▁in ▁the ▁spring ▁of ▁ 2 0 1 5 . ▁ ▁Ult imate ▁Fight ing ▁Championship ▁He ▁made ▁his ▁debut ▁against ▁Ya ot zin ▁Me za ▁at ▁U FC ▁Fight ▁Night ▁ 6 4 ▁on ▁April ▁ 1 1 , ▁ 2 0 1 4 . ▁He ▁lost ▁the ▁back ▁and ▁forth ▁fight ▁by ▁un anim ous ▁decision . ▁ ▁St as iak ▁was ▁briefly ▁linked ▁to ▁a ▁fight ▁with