Potential Rangers manager candidate Kevin Muscat has stepped down from his role in charge of Japanese side Yokohama F Marinos. The former Ibrox player – who spent the treble-winning 02/03 season in Glasgow – leaves by “mutual” consent in search of a “new challenge”. It comes after Kevin Muscat was strongly linked with the Rangers job following the sacking of Michael Beale, although the gig eventually went to Philippe Clement. Similarly, Kevin Muscat was linked to the manager’s job at Championship side Millwall, another of his former clubs, but lost out to Joe Edwards. Kevin Muscat bows out at …