The Masters was the last major tournament left for McIlroy to complete the modern golf Grand Slam – a feat only five others have managed before him.
McIlroy, who was making his 11th attempt at completing the Grand Slam, faced off against Ryder Cup teammate Justin Rose in a sudden-death play-off to decide the Masters champion, after they finished tied on 11 under at the end of regulation on Sunday.
‘So hard to stay patient’
Speaking at a press conference after his victory, McIlroy said: “You have to be the eternal optimist in this game.
“I have been saying it until I am blue in the face but I truly believe I am a better player now than 10 year ago.
“It is so hard to stay patient, keep coming back and not being able to get it done.
“There were points on the back nine where I thought, ‘have I let this slip again?’ but I responded and am really proud of myself.
“It has been an emotional week so I am thrilled to be last man standing.”
Just before slipping on a coveted green jacket during the presentation ceremony, the Northern Irishman said: “It’s my 17th time here and I started to wonder if it would ever be my time.
“I’m just absolutely honoured and thrilled and just so proud to be able to call myself a Masters champion.”
McIlroy had missed his six-foot putt for par, a bogey which dropped him back to 11 under, where he joined Rose – leading to a dramatic playoff between the two.
Only five other golfers have been able to complete a career Grand Slam – Tiger Woods, Jack Nicklaus, Gary Player, Ben Hogan and Gene Sarazen.
McIlroy is a two-time winner of the PGA Championship, claiming the prize in 2012 and 2014.
The 35-year-old also won his first major title, the US Open, in 2011, and won the Open Championship in 2014.
Source: Sky News