Joseph Anthony "Trey" Mancini III (born March 18, 1992) is an American professional baseball first baseman and outfielder for the Houston Astros of Major League Baseball (MLB). He made his MLB debut in 2016 with the Baltimore Orioles. His nickname "Boomer", originally "Boom Boom" after Ray Mancini, had morphed into its current form when he enrolled at the University of Notre Dame.
