Joseph Contreras (born May 6, 2008) is an American baseball pitcher. Contreras played for Brazil in the 2026 World Baseball Classic, where he was the youngest player in the tournament.
Contreras's parents are José Contreras, a Cuban pitcher who in 2008 was pitching for the Chicago White Sox, and Isabel, a woman of Brazilian ancestry who was born in Houston. He was raised in Roswell, Georgia and currently pitches at Blessed Trinity Catholic School. He is committed to playing college baseball at Vanderbilt University but is also eligible for the 2026 Major League Baseball draft.
At 17 years of age, Contreras was named to the Brazil national baseball team for the 2026 World Baseball Classic (WBC). He was the youngest player on any roster at the WBC. At the time, he was ranked number 34 on Baseball Americas list of top prospects for the 2026 MLB Draft. In his international debut, Contreras pitched innings against the United States, and induced an inning-ending double play by Aaron Judge.
Contreras is tall and weighs . He has a four-seam fastball which peaks at ; Major League Baseball (MLB) scouts have suggested that his best pitch is a forkball.