I seriously doubt that the league has insurance to cover the legal defense much less any liability that might be found. So where does the money come from?
it comes from the multi-billion dollar contract that the NFL has with the tv networks every year, merchandising, etc.. i'm not saying it's right or isn't, i honestly don't know-- but i do know that if found liable, the NFL has the $$ to pay pretty much any verdict rendered and continue operating, unless it's $100 Billion or something.