Niuman José Romero (born January 24, 1985) is a Venezuelan professional baseball infielder who is currently in the New York Mets organization. He made his major league debut on September 8, 2009, with the Cleveland Indians and also has played with the Boston Red Sox.
Romero was originally signed by the Cleveland Indians as an amateur free agent in 2002. Three years later, he officially joined the Indians organization and played for the rookie-level Burlington Indians. Over the next four seasons, Romero played for the Lake County Captains, Kinston Indians, Akron Aeros, and Columbus Clippers. In late 2009, he made his major league debut and played in ten games.
On May 1, 2010, Romero was acquired by the Boston Red Sox for cash considerations. On July 2, 2010, he was called up to replace Ángel Sánchez, who was traded to the Houston Astros for Kevin Cash. He only appeared in two games for the Red Sox in 2010 before he was designated for assignment and returned to the minors. He became a free agent after the season. On March 1, 2011 Romero signed a minor league contract with the Toronto Blue Jays.