Though much of the controversy regarding so-called “transgenderism” and athletic competition focuses on biological males infiltrating women’s sports, a recent op-ed in the New York Times highlights the story of a female college swimmer who has begun competing against men — and has more or less tanked her collegiate career.

Iszac Henig, a senior earth and planetary sciences major at Yale University, spent most of her life competing against other females — and winning. She grew up “in progressive California,” where she and her teammates broke a national relay record when she was just 14. By 2016, she was so good that she qualified to try out for the U.S. Olympic team.