The 20 most popular athletes in the world

Denis Doyle/Getty Images The list of the most famous athletes in the world is dominated by footballers, and no athlete is better known than Cristiano Ronaldo. In the most recent issue of ESPN the Magazine, Ben Alamar, ESPN's director of sports analytics, came up with a way to measure every top athlete's fame. The formula uses earnings on and off the field, social-media popularity, and Google search popularity. Below we take a closer look at the 20 best-known athletes; the list contains eight so...