14) Mary Pierce – Net Worth: $16 Million

This French American tennis professional player has won four Grand Slam titles. She has also won 10 WTA doubles titles and 18 WTA singles titles. She was first acquainted with tennis at the age of 10. She made history when she was 14 years by being the youngest tennis player to have participated in a professional tour. Her net worth is $16 million.

13) Danica Patrick – Net Worth: $18 Million

This Wisconsin-born auto racer became the first woman to win any Indy car race when she won the 2008 Indy Japan 300. She earned $12 million in 2012 alone from NASCAR. She also makes money by endorsing various brands like GoDaddy and Coke Zero.