If you have a younger sister or brother, they are the youngest pro athlete.
The youngest athlete aged 13, Adzo Kpossi, of Togo in Swimming. There are seven athletes aged 14.
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The youngest athlete at the Olympics of 2008 is 12 year old Antoniette Joyce Gueida Mouaffo of Cameroon who competed for women's freestyle event.
Fredua Koranteng "Freddy" Adu became the youngest pro athlete ever in history. At the age of 14, he was selected by D.C. United in the 2004 MLS SuperDraft.