By Frank Dalleres Fenway Sports Group plans to buy a sister club to Liverpool FC after luring former sporting director Michael Edwards back to the organisation in a new high-powered role. FSG announced the return of Edwards as CEO of football for the US-based group, which also owns baseball’s Boston Red Sox, ice hockey franchise the Pittsburgh Penguins and has just invested in a new arm of golf’s PGA Tour. Among his responsibilities will be helping Liverpool to identify a successor to Jurgen Klopp in the summer and “supporting the growth of FSG in global football through additional investment …