MLB Chicago Cubs Black on Black 59FIFTY Fitted Cap by New Era. $29.99. 59FIFTY fitted cap in fashion color. Officially licensed by Major League Baseball. 100% Wool. Embroidered Team logo in raised embroidery at front. 59FIFTY is the official on-field cap of Major League Baseball and is worn by every Major League Baseball player. With this fashion version of the 59FIFTY you can show your team pride with style.