Riley Gaines (left) responded to Simone Biles (right) on X
Olympic gymnastics champion Simone Biles has called former US swimmer and activist Riley Gaines "sick" over online comments about a transgender woman softball player.
Gaines, who has regularly spoken out about transgender women athletes competing in women's sport, mocked Minnesota State High School League for removing comments on their post about the Chaplin Park girls' team celebrating the State Championship.
Chaplin Park's team includes a transgender woman player.
"You're truly sick, all of this campaigning because you lost a race. Straight up sore loser," Biles wrote on X.
