U.S. Women's National Team legend Mia Hamm spoke to Yahoo Sports about the importance of equal pay across men's and women's soccer and why it is such a pivotal thing to pursue, but may not be enough to achieve true equality across the sport. Mia joined Yahoo Sports on behalf of TIAA to promote the importance of gender equality in retirement. Learn more about how TIAA is working to encourage pay equality in sport by visiting www.retireinequality.com.