In 2015, the world watched as soccer star Abby Wambach kissed her wife after the US women's World Cup victory. Milwaukee Brewers' minor league first baseman David Denson came out as gay. And Caitlyn (born Bruce) Jenner, an Olympic decathlete, came out as transgender.

It hasn't always been this way. Many great athletes have stayed in the closet their whole lives, or at least until retirement. Social attitudes, institutional policies, and laws are slow to change, but they are catching up. Together, athletes, families, educators, allies, and fans are pushing for competitive equity so that every athlete, regardless of identity, can have the opportunity to play at their very best.