Jordan Spieth isn't merely in the zone these days. He is the zone. Spieth earned more than $53 million in 2015, supplanting Tiger Woods as golf's highest earner.
Spieth ranked 16th in total earnings in 2014. But thanks to a career-high five wins on Tour last season, including victories at The Masters and U.S. Open, Spieth raked in more than $23 million on the course. Other endorsement deals, including a a 10-year deal with Under Armour, brought in another $30 million.