I don't agree with premise, because many teams in all professional sports have poor management that has has undercut their respective teams' competitive performance, and there has been no intrusion from the commissar. Since when is Selig concerned about the Dodgers' competitiveness anyhow? He's a Milwaukee Brewers' fan, isn't he?
McCourt still has one of the higher player payrolls in the National League. The reason why the team is doing poorly on the field right now has everything to do with poor player personnel decisions, not McCourt's finances - if Selig will leave him alone, that is, and not force him into bankruptcy and a takeover by Selig and his Park Avenue suits. The latter can only result in worse financial straits and lousier performance on the field with a drastic falloff in attendance and interest. Remember the Montreal Expos? Case closed!
In any business arrangement where an owner's personal financial situation is affected by marital turmoil, the only way to resolve the situation without harming the company is to completely separate the resolution of the marital situation from the organization . . . even if it means the ownership interest of the person in question company has to be sold in order to avoid having the whole situation drag on indefinitely.