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This list differs than the list put out each year by Forbes.com, which includes both salaries and endorsements.
Aaron Rodgers is the highest-paid among the "Big 4" North American sports leagues, taking home $40 million in 2013, including a $35 million signing bonus as part of his new contract.
Here are the 25 highest-paid from 2013:
1. Floyd Mayweather Jr (boxing) - $73.5 million
2. Cristiano Ronaldo (soccer) - $50.2 million
3. Lionel Messi (soccer) - $50.1 million
4. Aaron Rodgers (football) - $40.0 million
5. Zlatan Ibrahimovic (soccer) - $35.0 million
6. Matthew Stafford (football) - $31.5 million
7. Tom Brady (football) - $31.0 million
8. Kobe Bryant (basketball) - $30.5 million
9t. Matt Ryan (football) - $30.0 million
9t. Joe Flacco (football) - $30.0 million
11. Zack Greinke (baseball) - $28.0 million
12t. Fernando Alonso (F1 racing) - $27.5 million
12t. Lewis Hamilton (F1 racing) - $27.5 million
14. Tony Romo (football) - $26.5 million
15. Wayne Rooney (soccer) - $26.0 million
16t. Ryan Howard (baseball) - $25.0 million
16t. Calvin Johnson (football) - $25.0 million
16t. Cliff Lee (baseball) - $25.0 million
16t. Peyton Manning (football) - $25.0 million
20t. Robinson Cano (baseball) - $24.0 million
20t. Prince Fielder (baseball) - $24.0 million
20t. Wladimir Klitschko (boxing) - $24.0 million
23. Cole Hamels (baseball) - $23.5 million
24. Mark Teixeira (baseball) - $23.1 million
25t. Joe Mauer (baseball) - $23.0 million
25t. Albert Pujols (baseball) - $23.0 million
25t. CC Sabathia (baseball) - $23.0 million