Mickey O'Neil is an Irish Traveler pejoratively referred to as a Pikey and plays an imperative role in the murder of Bricktop and the disestablishment of his overall authority including that of his followers and significantly reducing his presence in the underworld as of gambling, drugs, illegal underground fights, and gratuitous murders. He eventually gets embroiled in the circumstances of Turkish and Tommy, for a couple of reasons: Get Revenge on Bricktop for the unfortunate murder (eventual), A bet made with Tommy and Turkish for a new caravan (circumstantial), and for fun (fixed). Although Mickey is an Irish goofball, he's an extremely formidable opponent and is not an individual who should be taken as a child, or the consequence is to be that of Gorgeous George.