It's also entirely possible that it's all his own money. (doubtful, but possible)
Money he's been paid as a legitimate salary and bonuses and stock options that's made him an extremely wealthy man in his own right. It doesn't make much sense but then again, owning a football club doesn't either.
The idea behind money laundering is dirty money in, clean money out.
So far it's all in, in, in. Absolutely nothing out. That's not laundering, that's pure bad business.
Finally, if you were serious about money laundering you'd hardly do it via the most watched league of the worlds most popular sport, It draws too much attention. Infact, can you give any examples of a club in a major league with even a hint of suspicioun it's being used to launder money?
Take your time if you like.