20. American Pharoah: Net Worth $4.53 Million
The first Triple Crown winner since 1978, American Pharoah earned $1.24 million for his win at the Kentucky Derby, $900,000 for his victory at the Preakness and $800,000 for winning the Belmont Stakes. His overall 2015 winnings totaled $3.37 million. Over his career so far, he has earned $4.53 million. The probability of landing lucrative corporate endorsements could push that number much higher.