Edwin "Eddie" Boison, known as Cowbell Man, is a stadium fixture for the New York Mets. He can be seen at nearly every home game at Citi Field, wandering around the concourses while banging a cowbell. He typically wears personalized jerseys with the nom de plume Cowbellman. In 2009, he wore a batting practice jersey with the number 15, which from 2005-2011 was assigned to outfielder Carlos Beltran. Prior to the Mets' acquisition of Beltran, Cowbell Man's jersey featured the number 10, worn by Endy Chavez. Cowbell Man is usually seen strolling around Citi-Field interacting with the fans. As of September 2015, Cowbell Man wears a Met jersey with "COWBELLMAN" and #21, a number that is also worn by player Lucas Duda.