Rory McIlroy back to old putter after tinkering at Genesis

MEXICO CITY – It was one hole that cost Rory McIlroy at last week's Genesis Invitational, with the world No. 1 pointing out he played the other 17 holes in even par on Sunday.

McIlroy also added that he took plenty of positives out of his tie for fifth despite the fact he’d started the final round tied for the lead before a double-bogey 7 at the fifth hole dropped him out of contention.

But if it was his approach shot that airmailed the green at the fifth at Riviera that cost him, it was his putter that paid the price. McIlroy revealed following an opening 65 on Day 1 at the WGC-Mexico Championship that he switched back to his regular putter this week after experimenting with a longer shaft…