According to Forbes magazine, as of June 2014, the highest-paying sport is boxing, with Floyd Mayweather having earned $105 million from June 2013 to June 2014. All of his earnings came in the form of salary and earnings. He earned no money from endorsements.
Forbes magazine publishes a list of the highest-paying sports in the world each year. As of 2014, the second highest-paying sport is soccer, with Christiano Ronaldo earning $80 million. Basketball completes the top three, with LeBron James earning $73.4 million.
According to Forbes, $2.75 billion was earned during the 2013 to 2014 12-month period by top athletes from 27 countries.