By Steve Keating TORONTO (Reuters) – PGA Tour commissioner Jay Monahan visited the players on the front line of golf’s feud with the LIV Golf Invitational Series at the Canadian Open on Sunday, and blasted those who have jumped to the Saudi-backed venture as free-riders. With the Canadian Open and LIV inaugural event at Centurion Club outside London both played at the weekend it marked the first head-to-head showdown between the PGA Tour and the controversial big-money breakaway series that is looking to shake up golf’s status quo. A 54-hole format, with no cuts and a team element bolted on, i…