Olympic gymnastics champion Simone Biles has called former US swimmer and activist Riley Gaines "sick" over online comments about a transgender woman softball player. Chaplin Park's team includes a transgender woman player. Straight up sore loser," Biles wrote on X.Gaines tied for fifth place with transgender woman Lia Thomas in the 200m freestyle swimming at the 2022 NCAA Championships. She withdrew from the women's team final at the Olympic Games in Tokyo in 2021, as well as four subsequent individual finals, in order to prioritise her mental health. She has become an advocate for banning transgender women athletes from competing against women and girls.