A slew of Olympians, coaches, and swimming championship alumnae are calling on the NCAA to “protect our women athletes” and “rectify” the situation it created by allowing a biological man to compete with women.

The group of University of Arizona alumnae aired their concerns in an open letter to the NCAA signed by “The Women of Arizona Swimming & Diving” and obtained by The Daily Wire.

It was sent to the NCAA on Thursday amid controversy over biologically male athlete Lia Thomas, who identifies as transgender.