José Javier Valentín Rosario (born September 19, 1975) is a Puerto Rican former professional baseball catcher. From 2004-2008, he played for the Cincinnati Reds after playing with the Tampa Bay Devil Rays (2003) and four brief stints for the Minnesota Twins from 1997-2002. He is the younger brother of former Major League Baseball second baseman José Valentín and the uncle of Philadelphia Phillies infielder Jesmuel Valentín. In 2005, he hit .281 with a career-high 14 home runs as a backup catcher for the Reds. He is a switch-hitter. Valentín played briefly at first base and even more infrequently at third base in his time with Cincinnati.