▁but ▁had ▁to ▁withdraw ▁as ▁he ▁suffered ▁a ▁broken ▁hand ▁during ▁training . ▁ ▁Ult imate ▁Fight ing ▁Championship ▁ ▁In ▁October ▁ 2 0 1 0 , ▁World ▁Ext reme ▁C age f ight ing ▁merged ▁with ▁the ▁Ult imate ▁Fight ing ▁Championship . ▁As ▁part ▁of ▁the ▁mer ger , ▁all ▁W EC ▁f igh ters ▁were ▁transferred ▁to ▁the ▁U FC . ▁ ▁Jew t usz ko ▁faced ▁Curt ▁War bur ton ▁on ▁February ▁ 2 7 , ▁ 2 0 1 1 ▁at ▁U FC ▁ 1 2 7 ▁and ▁suffered ▁his ▁first ▁loss ▁of ▁his ▁professional ▁career ▁via ▁un anim ous ▁decision . ▁After ▁the ▁loss , ▁Jew t usz ko ▁was ▁released ▁from ▁the ▁promotion . ▁ ▁K SW ▁ ▁Jew t usz ko ▁made ▁his ▁Kon front acja ▁S zt uk ▁Wal ki ▁debut ▁at ▁K SW ▁ 1 7 ▁against ▁Art ur ▁S owi ński , ▁losing ▁after ▁being ▁knock ed ▁out ▁by ▁p unch es ▁ 4 6 ▁seconds ▁into ▁the ▁first ▁round . ▁ ▁He ▁then ▁fought ▁Ult imate ▁F ighter ▁contest ant ▁Dean ▁Am as inger ▁at ▁K SW ▁ 1 8 , ▁winning ▁the ▁fight ▁via ▁T K O ▁( p unch es ) ▁ ▁Jew t usz ko ▁then ▁rem atch ed ▁Art ur ▁S owi ński ▁at ▁K SW ▁ 2 1 ▁to ▁crown ▁the ▁first ▁K SW ▁Light weight ▁Champion . ▁This ▁time ▁around , ▁Jew t usz ko ▁won ▁via ▁submission ▁( d ' ar ce ▁cho