Estimated Net Worths of the Top 10 Golfers in the World. When it comes to professional golfers, winning tournaments and earning endorsements account for a majority of their income. . It is because of this that a golfer’s net worth varies, as some have had years to amass their fortunes, while others are fairly new to the game. Here are the estimated net worths of the current top 10 golfers in the world, according to celebritynetworth.com. 1. Brooks Koepka ($18 million). 2. Rory McIlroy ($150 million). 3. Jon Rahm ($3 million). 4. Justin Thomas ($30 million). 5. Dustin Johnson ($20 million). 6. Tiger Woods ($800 million). 7. Patrick Cantlay ($1 million). 8. Justin Rose ($40 million). 9. Xander Schauffele ($10 million). 10. Tommy Fleetwood ($15 million)