Milciades Arturo "Junior" Noboa Díaz (born November 10, 1964) is a Dominican former professional baseball player who played eight seasons for the Cleveland Indians, California Angels, Montreal Expos, New York Mets, Oakland Athletics, and Pittsburgh Pirates of Major League Baseball.
Noboa also served as the hitting coach for the Dominican Republic National Team during the 2006, 2009, and 2017 World Baseball Classic.
He currently works in the Arizona Diamondbacks front office as Vice President, Latin Operations. In his current role, Noboa oversees the D-backs' baseball academy in Boca Chica in the Dominican Republic and serves as the team's liaison to its Latin American prospects. Under Noboa's tenure, he has aided in the signing of Miguel Montero, Gerardo Parra, Ender Inciarte, Carlos Gonzalez, and José Valverde. Noboa has also led a first of its kind education program for Latin American players and hosted Ken Kendrick, Derrick Hall, and other members of the Diamondbacks staff in the Dominican Republic for scouting purposes.
He is also the second cousin of Chris Noboa, producer formerly from The Howard Stern Channels and The Scott Ferrall Show on Sirius XM radio.