Former Sheffield Wednesday boss Xisco Munoz could yet achieve an incredible feat this season. For Sheffield Wednesday, both in terms of the football and the numbers, Munoz is their worst-ever manager to date. And his record of 0 wins in 12 total matches will take some beating, with his successor Danny Rohl already having as many wins as Munoz had matches in charge, in just 30 games at the club. Xisco Munoz Sheffield Wednesday recordSheffield Wednesday earned promotion from League One via the play-offs last season and looked set for a promising, albeit tough year in the Championship under Darre…