Although the punishment would actually have been fitting for the person and the crime given how they justified it, it isn't exactly within their power to do. If they file a grievance, they should be able to get the suspension nullified. He would have to serve a couple games, I would bet and it's possible it would be moot but the PA is not going to let this suspension fly. It doesn't matter whether they can appeal the suspension. They should file a grievance for a CBA violation.