José Juan "J. J." Barea Mora (born June 26, 1984) is a Puerto Rican professional basketball player for the Dallas Mavericks of the National Basketball Association (NBA). He played college basketball for Northeastern University before joining the Mavericks in 2006 and becoming just the seventh Puerto Rican to play in the NBA. He went on to win an NBA championship with the Mavericks in 2011 before signing with the Minnesota Timberwolves where he played for the next three seasons. He has also played in the NBA Development League and the Baloncesto Superior Nacional.
Barea was a member of the Puerto Rican national team that won the gold medal in the 2006 and 2010 Central American and Caribbean Games. He was the starting point guard for Puerto Rico when they won the gold medal in the 2011 Pan American Games and the silver medal in the 2007 Pan American Games.