9. Rory McIlroy: $80 million
North Irish golfer Rory McIlroy is one of the most successful players in professional golf history and has achieved a net worth of around $80 million. He ranked at the top of the World Amateur Golf Ranking for one week at age 17, marking a successful amateur career before he continued on to his professional career.
In 2011, at the age of 22, he broke a record as the youngest player to achieve career earnings of 10 million euros on the European tour. A year later, he broke a similar record, earning 10 million dollars on the PGA tour.