Rory McIlroy's historic back-to-back Masters victories have not only cemented his legacy but also significantly boosted the wealth of his long-time caddie, Harry Diamond. Diamond, a close friend of McIlroy, has seen his personal fortune grow substantially since becoming the Northern Irishman's full-time caddie in 2017, with career earnings now exceeding €10 million (£8.5 million).
However, Diamond's financial standing is still measured against the benchmark set by Steve Williams, Tiger Woods' iconic former caddie. Williams, who worked with Woods from 1999 to 2011 and was present for 13 of his 15 major victories, amassed an estimated net worth of $20 million (£15.7 million). At the peak of Woods' dominance, Williams' income from prize-money cuts and endorsement deals made him one of the highest-earning athletes in New Zealand.
The financial landscape of golf has evolved dramatically since the early 2000s, with prize funds reaching unprecedented levels. After McIlroy's 2026 Masters win, where he claimed a record $4.5 million (£3.36 million) winner's prize, Diamond is believed to have earned $450,000 (£336,000) from that single tournament. Caddies typically take 10 per cent of winnings and around seven per cent for top-10 finishes.
While Williams remains the wealthiest caddie in history, Diamond is steadily closing the gap. If McIlroy continues his run of major victories, a new record-holder could soon emerge. Diamond's role contrasts with Williams' high-profile era; he embodies the understated professional, providing reassurance that McIlroy says 'probably no one else in the world could.'
