Getty Chicago Cubs President of Baseball Operations Jed Hoyer The prevailing opinion among MLB analysts is that the Chicago Cubs will attempt to make a big splash in the free agent pitching pool this offseason. But while their first signing may have technically landed a sizeable piece, it’s the kind of move that hardly registers as more than a shallow ripple. On Nov. 13, the Cubs signed free agent pitcher Sam Mettert, a 6-foot-5, 225-pound St. John’s University graduate whose name was not