Simone Biles and Riley Gaines traded social media barbs over the latter's recent comments advocating for the exclusion of transgender athletes in women's ... referencing Gaines' fifth-place finish.

Former University of Kentucky swimmer Riley Gaines, second from right, stands during a rally on Thursday, Jan. 12, 2023, outside of the NCAA Convention in San Antonio.

Gaines has made a career out of attacking the participation of transgender women athletes since tying Lia Thomas for fifth place in the 200-yard freestyle at the NCAA championships in 2022.