Liverpool ownership group FSG is one of the most valuable sports empires on the planet and could be about to get even more so. As well as its majority stake in Liverpool, Fenway Sports Group controls baseball giants Boston Red Sox and NHL’s Pittsburgh Penguins, as well as stakes in the PGA Tour and a NASCAR franchise. A recent valuation appraised their sports portfolio as being worth in excess of £10bn, with FSG one of the only ownership groups to feature more than once in a list of the the most valuable sports teams. Around half of that value comes from Liverpool. Not bad for a club that FSG …