I had a friend who's daughter was an outstanding soccer player. In her senior year of high school he took her to visit all of the top universities in soccer on the East Coast. What they found was that if she wasn't lesbian, she just wasn't welcome in those schools. She ended up attending SMU (Texas) on a soccer scholarship, where she said sexual orientation was not a factor.
I have read that there a numerous lesbians playing professional golf and based on the information above, I would assume that most of the female soccer players a lesbian as well.