Who Is Rory McIlroy’s Caddie?
McIlroy enjoyed a fruitful eight years with JP Fitzgerald before teaming up with his best friend Harry Diamond


Who Is Rory McIlroy’s Caddie?
Rory McIlroy has his best friend, Harry Diamond on the bag. The pair grew up together in Holywood, Co Down, and although another of his friends, Niall O'Connor, took the bag in 2022 - during which time they won the RBC Canadian Open together - Diamond quickly returned.
O’Connor, a friend who met McIlroy in his late teens, caddied for McIlroy once before, at the 2019 DP World Championship in Dubai. He played high-level rugby for Ulster and is also a keen golfer. The partnership came about because McIlroy's usual caddie, Diamond, was expecting a second child with his wife. McIlroy and Diamond teamed up in 2017 after McIlroy and JP Fitzgerald split after eight years and four Majors together. It was thought to be a short-term alliance, and many thought he would seek a more experienced looper, but they have been together ever since.
The pair, who have enjoyed nine PGA Tour victories together as well as two FedEx Cup triumphs in 2019 in 2022, have been friends since their junior days at Holywood Golf Club. Diamond was also an outstanding player, representing Ireland as a youngster. In 2012, he won the West of Ireland Championship which earned him a spot at the Irish Open that year. As well as being on McIlroy's bag, Diamond was also by his side as Best Man when his boss married Erica Stoll in Co Meath in 2017. Diamond enjoyed a spell off studying yardage booklets to arrange the stag party in Miami.
McIlroy describes the relationship as being particularly close. "I was an only child and Harry was a big brother. We’re very close. I love having him on the bag. I’m a different person. And I’m never going to give him sh** even if something goes wrong. It would not be worth it.”
The pair are yet to win a Major together, something that is repeatedly pointed out with McIlroy having been stuck on four since 2014, but one of their high points came when Diamond talked McIlroy into taking a penalty drop at the 72nd hole before finding the green at Quail Hollow.
“Harry was awesome out there especially that decision on the last,” reflected McIlroy. “I was ready to get in there and try to play that with a lob wedge and he was sort of like, ‘Let's take a step back, let's think about this, where's the best place you're hitting your third from.’
Get the Golf Monthly Newsletter
Subscribe to the Golf Monthly newsletter to stay up to date with all the latest tour news, equipment news, reviews, head-to-heads and buyer’s guides from our team of experienced experts.
"So he sort of calmed me down, slowed me down a little bit and said, ‘Pal, let's just think about this.’ Ultimately we made the right decision, it's Harry and I's sixth win together and it's probably been our best one. Bay Hill back in 2018 was great because I hadn't won in a while, but this is even better just because Harry's been there every step of the way."
After McIlroy's win at The Players in 2019, he described Diamond as 'one of the best caddies out here, if not the best'.
Off the course, Diamond is fairly private, staying away from social media and saying very little about his work with McIlroy. He is believed to own a number of his own businesses, including several bars.
How Much Does Rory McIlroy's Caddie Make?
Needless to say, McIlroy is one of the hottest bags in the world. The four-time Major winner reportedly paid Fitzgerald 10 per cent of his $9 million he took home that day from his FedEx Cup bonus in 2016 and 10 percent from the Tour Championship earnings.
McIlroy picked up $2.25m for his Players win in 2019 and his PGA Tour earnings range from $4-7m a year so, whatever percentage Diamond is on, he'll be earning a lot more than many players. There is also the nice little kicker that they are best friends so you would imagine that there are plenty of bonuses to go with the private jets and luxurious lifestyle.
Sam is Golf Monthly's Senior E-commerce Editor which mean's he oversees everything E-com related on the site.
This takes the form of creating and updating Buying Guides, reviews, and finding bargain prices for deals content.
Working with golf gear and equipment over the last seven years, Sam has quickly built outstanding knowledge and expertise on golf products ranging from drivers, to balls, to shoes.
He combines this knowledge with a passion for helping golfers get the best gear for them, and as such Sam manages a team of writers that look to deliver the most accurate, insightful, and informative reviews and buying advice. This is so the reader can find exactly what they are looking for, at a good price.
Additionally Sam oversees Golf Monthly voucher/coupon content which seeks to find you the best offers and promotions from well-known brands like Callaway, TaylorMade and many more.
Unfortunately, Sam is not a member of any club at the moment but regularly gets out on the golf course to keep up the facade of having a single-figure handicap.
-
Valspar Championship Tee Times - Round Three
Jacob Bridgeman leads a number of big names going into the weekend of the Valspar Championship, with the American searching for a maiden PGA Tour title
By Matt Cradock Published
-
'They Can Feel Free To Leave Some Waffle House Gift Cards' - Neal Shipley Makes '12 New Friends' As Final Hole Bogey Moves Valspar Championship Cutline
A late bogey from Shipley meant the cutline moved to two-over-par, thus allowing 12 MORE players to make it into the weekend at the Copperhead Course
By Matt Cradock Published
-
Who Is Luke Clanton's Caddie? Meet Jason Wiertel
Luke Clanton was one of the first graduates from the PGA Tour U Accelerated program and has been with his caddie since long before turning professional
By Jonny Leighfield Published
-
Who Is JJ Spaun's Caddie? Meet Mark Carens
Find out more about Massachusetts-born Mark Carens, who has enjoyed a highly-successful career to date and has been on the bag of JJ Spaun since April 2021
By Jonny Leighfield Published
-
Who Is Jake Knapp's Caddie?
Less than 18 months after earning his PGA Tour card, Jake Knapp had a win and a 59 on his resume, and alongside him as he's built his reputation is caddie Mike Stephens
By Mike Hall Published
-
Who Is Kevin Yu’s Caddie?
Californian Zeke Salas has assisted Kevin Yu during the opening years of a promising PGA Tour career – here’s what we know about him
By Mike Hall Published
-
Who Is Max Greyserman's Caddie?
After a spell with James Moreno, Max Greyserman's has turned to Adam Parmer as his PGA Tour career progresses
By Mike Hall Published
-
Who Is Ben Griffin’s Caddie?
The American has had one caddie alongside him throughout his PGA Tour career, Alex Ritthamel – get to know him here
By Mike Hall Published
-
Who Is Matt McCarty’s Caddie?
Matt McCarty's caddie is not just playing a pivotal role in his success on the course - he's also a close friend off it
By Mike Hall Published
-
Who Is Maverick McNealy's Caddie?
The PGA Tour pro turned to his brother Scout in 2024, and that has coincided with the best run of form of his career
By Mike Hall Published