Juan Carlos Oviedo (born March 15, 1982[a]) is a Dominican former professional baseball pitcher. He bats and throws right-handed. At age 17, he began using the name Leo Núñez, although his true identity was revealed in 2011. He played in Major League Baseball (MLB) for the Kansas City Royals, Florida Marlins and Tampa Bay Rays.\n', '

Oviedo was born in Bonao in the Dominican Republic. At age 17, Oviedo assumed the identity of his 16-year-old best friend, Leo Nunez, in order to receive a more lucrative contract. In 2011, Marlins reliever Edward Mujica, a close friend of Oviedo\'s, said that "[a]t 17 years old, you maybe lose $100,000 or $150,000 when you sign [compared to a 16-year-old with the same skills]. And if you\'re like 18, you might sign for $5,000 and maybe they give you an opportunity."\n', '

Oviedo was originally signed by the Pittsburgh Pirates as an undrafted free agent on February 16, 2000. From 2001 to 2004, he was mainly used as a starting pitcher in the Pirates system. On December 16, 2004, he was traded to the Kansas City Royals for catcher Benito Santiago.\n', '

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