Rory McIlroy's Caddie Harry Diamond: From Controversy to Masters Glory
Rory McIlroy's extraordinary weekend at Augusta National was defined by a crucial partnership that extends far beyond the golf course. While the Northern Irish golfer had numerous supporters during his Masters triumph, one individual proved more instrumental than any other: his caddie and best friend, Harry Diamond.
A Friendship Forged in Childhood
Though Harry Diamond has been carrying McIlroy's bag since 2017, their connection stretches back much further. The two first crossed paths as exceptionally gifted youngsters at Holywood Golf Club in Northern Ireland, where both showed promising careers ahead of them.
While not quite matching McIlroy's professional standard, Diamond is an accomplished golfer in his own right. Competing as an amateur, he claimed the 2012 West of Ireland tournament to secure his place at the Irish Open. Eventually, he chose to step away from competitive play to help his close friend chase his ambitions on the golf course.
The Lucrative Partnership
McIlroy's second Masters victory handed him a cheque for £3.3 million, with 10 percent of that heading straight to his caddie. That amounts to a handsome £330,000 for Diamond, who is unsurprisingly among the wealthiest bag carriers on the PGA Tour. With an estimated net worth of around £2.5 million, Diamond's decision to support McIlroy has proved both shrewd and financially rewarding.
The pair shared a heartfelt embrace on the green after McIlroy holed the winning putt, with their close bond evident to all observers. "I've known Harry since I was seven years old," said an emotional McIlroy after his 2025 Masters win. "He's been like a big brother to me the whole way through my life."
Personal Life and Private Matters
Harry Diamond's romantic journey once mirrored McIlroy's during their twenties. He was engaged to Irish designer Katie Larmour, with whom he shared a five-year romance. The couple became engaged in Paris during October 2013, just two months before McIlroy's proposal to then-partner Caroline Wozniacki.
However, both relationships ended around the same time, with Rory calling off his engagement in 2014 and Harry and Katie separating shortly after. Nowadays, Diamond keeps his personal life largely private, with limited details regarding his romantic endeavours.
In 2019, another of McIlroy's friends, Niall O'Connor, temporarily assumed caddying responsibilities at the DP World Championship in Dubai while Diamond was reportedly expecting his first child with his wife. O'Connor stepped in once more at the 2022 RBC Canadian Open due to Diamond and his wife reportedly welcoming their second child.
Controversial Appointment
Despite their longstanding friendship, Diamond hasn't always been the man carrying McIlroy's bag. He only took on the role after McIlroy parted company with seasoned caddie JP Fitzgerald following the 2017 Open Championship.
McIlroy and Fitzgerald had claimed 13 titles together, and the choice to replace him with a close friend was not exactly met with open arms by many former players and pundits. Diamond served as best man at McIlroy's wedding in 2018, and to many observers, it appeared as though McIlroy was prioritising comfort over finding someone who might push him harder.
Tiger Woods' former coach, Hank Haney, and commentator Smylie Kaufman were among those to air their reservations, particularly following a string of high-profile errors from McIlroy. The general consensus was that Diamond wasn't assertive enough and simply let his friend take unnecessary risks without sufficient input on the course.
Defending the Partnership
Such criticism has clearly got under McIlroy's skin, forcing him to publicly defend his caddie. Diamond himself has chosen to keep a low profile by declining all media requests.
"Just because Harry is not as vocal or loud with his words as other caddies, it doesn't mean that he doesn't say anything and that he doesn't do anything," McIlroy explained in the past. "They are never there to say Harry did such a great job when I win, but they are always there to criticise when we don't win."
Vindication Through Victory
The Masters triumphs of the past 12 months will feel like vindication for McIlroy, who used his 2025 press conference to detail crucial moments when Diamond stepped in. Above all else, his friend keeps him composed on the course, and they've now racked up 21 tournament victories together.
For 2019 Open champion Shane Lowry, the criticism has always been unjustified and hypocritical: "[McIlroy's] the greatest golfer of our generation, and I don't think he gets any leeway at all. And some of the criticism Harry gets off the back of it, now that really does my head in."
Lowry continued: "Dustin Johnson had his brother caddying for him for 10 years, and nobody said anything; other players have had the same caddie for 15 years, but everything Rory does is scrutinised. To be honest, there is no caddie in the world that would be better for Rory than Harry Diamond."
Peer Recognition
Jason Day, who finished tied for 12th at Augusta this year, can also relate to Diamond's situation. He himself brought on board a childhood friend, Luke Reardon, just a month after McIlroy appointed Diamond.
"Harry is an incredible caddie," said Day in 2025. "Harry is a tremendous caddie, and he works as hard as any caddie out there. I don't understand how anyone could question his ability on the bag and, as a player on tour, I've never even thought about it. He's just a great caddie."
The partnership between Rory McIlroy and Harry Diamond represents more than just a professional arrangement—it's a friendship that has weathered criticism, celebrated triumphs, and ultimately proved its worth on golf's biggest stages. From their early days at Holywood Golf Club to the hallowed grounds of Augusta National, their journey together continues to redefine what's possible when talent meets unwavering loyalty.
