College volleyball player Macy Petty is speaking out against biological males competing in women's sports.
Petty follows athlete Riley Gaines in protesting males in female sports spaces.
Coaches feel pressured to recruit trans athletes who have physical advantages.
Petty cites the University of Washington giving a volleyball scholarship to a 17-year-old trans athlete.
She worries about opportunities lost for female athletes.
Allowing males in women's sports risks serious injuries to females. Petty gives examples of injuries caused by trans players.
Petty herself competed against a male player, putting scholarships at risk.
She wants the NCAA to clarify that women's sports are for biological females only, as other female athletes have argued.