In 2010 the Fenway Sports Group purchased English Premier League side Liverpool Football Club. From the outset, their intentions were simple. They would apply statistics-based approaches to the running of Liverpool in terms of player acquisitions and team tactics. The method, popularised in the Michael Lewis book Moneyball about the Oakland A’s baseball team, had not yet been utilised in soccer but Fenway set about adapting the approach. Liverpool’s early signings signalled their new philosophy – They paid £20m for Stewart…