Slighty unrealistic but hear me out. On my fight night round 3 game(with hard difficulty) i started as a welterweight, knocked out Leonard, Hatton, Gatti, Ward, Robinson, De la Hoya, Duran then moved upto middle and beat Taylor, Wright, Hopkins, Hagler and LaMotta all by KO. Then moved upto light middle and knocked out Tarver and Roy Jones. Retiring with a 58-0 record, 58 KO's. Would this boxer be the best ever?