See Forbes World's Highest Paid Athletes of 2015

According to Forbes, these are the 10 highest paid Athletes of 2015 (From June 2014 - to June 2015)
1. Floyd Mayweather - $300m

2. Manny Pacquiao - $160m

3. Cristiano Ronaldo - $79.6m

4. Lionel Messi - $73.8m

5. Roger Federer - $67m  

6. LeBron James - $64.8 million 
7. Kevin Durant - $54.1 million
8. Phil Mickelson - $50.8 million 
9. Tiger Woods - $50.6 million
10. Kobe Bryant - $49.5 million
See the rest here