Wigan Athletic's owner, Dave Whelan also owned JJB Sports and at one time in the 1990s even had a kit which was the same as the staff of his shops wore. Since then he's often had a hand in the manufacture of the shirts and this one is no different. The JJB branding is more than likely no more than a badge with manufacture being done by a generic firm. This shirt is from Wigan's first season in the EPL. Somehow Wigan stay in the EPL when they get crowds more befitting a League One side.