Can McIlroy continue what he started?
First came The Open at Royal Liverpool and a two-stroke victory over Rickie Fowler and Sergio Garcia.
Then, three weeks later and with a World Golf Championships title under his belt as well, Rory McIlroy beat Phil Mickelson by a single shot at the PGA Championship to put the Wannamaker Trophy alongside the Claret Jug.
“There's still a few things in my game I need to tidy up and work on. I'm going to concentrate a lot on shots from 120 yards in and try to get that as sharp as I possibly can.”
Since that August day at Valhalla, scene in 2000 of Tiger Woods capturing a third successive Major, anticipation has been mounting to see if golf's current world number one can emulate that feat.
The opportunity comes at The Masters at Augusta National from 9-12 April and for McIlroy another victory would also represent the completion of a career Grand Slam, something achieved by only five men in history - Gene Sarazen, Ben Hogan, Jack Nicklaus, Gary Player and Woods.
The Northern Irishman, still only 25, finished his tournament build-up to this year's Majors with an 11th place at the Arnold Palmer Invitational and admitted: "There's still a few things in my game I need to tidy up and work on. I'm going to concentrate a lot on shots from 120 yards in and try to get that as sharp as I possibly can.
"For the casual golf fan The Masters is the start of the golf season and it's a big deal what I'm trying to achieve."
The spotlight is on him, of course. But that is nothing new - it has been since he was The Open's leading amateur at Carnoustie in 2007.
And in The Masters it is hard to imagine anything more testing than his experience in 2011 when, without a Major to his name at the time, he led by four with a round to play and slumped to 15th place with a nightmare closing 80.
Charl Schwartzel was the eventual winner in 2011, and the champions since then have been Bubba Watson, Adam Scott and Watson again last year by three from Jordan Spieth and Jonas Blixt. For the last European winner you have to go all the way back to José María Olazábal in 1999.
While Augusta National is familiar to all who follow the sport June's US Open enters the new territory of Chambers Bay just south of Seattle, a links-style course designed by Robert Trent Jones Jnr that opened for play in 2007.
McIlroy will return to the Old Course at St Andrews as the defending Champion when the 144th Open is staged there from 16-19 July. Five years ago at the 2010 Open at St Andrews, McIlroy matched the major record in the opening round with a nine under par 63, but followed that with an 80 in windswept conditions and ended up in a share of third place eight strokes adrift of runaway winner Louis Oosthuizen.
He will also be the defending champion at the PGA Championship, which returns in August to Whistling Straits in Wisconsin, yet another spectacular venue for the world's greatest golfers to test their skills.
For the moment, though, it is all eyes on Augusta and a course that invariably serves up thrills and spills in equal measure.