Padraig Harrington knows better than most what it takes to win multiple Majors and he believes that Rory McIlroy's all-round game has to be on song if he is to turn around his Major slump.
McIlroy's last Major win came here at Valhalla in 2014 and his putter has let him down this week – for the record, going into Sunday, leader Brian Harman had picked up over nine shots on the field while McIlroy had given up 1.5 shots.
