New Era Fitted Yale Baseball Cap - White. Officially Licensed White Yale University Baseball Cap exclusively available from DelMonico Hatter. Fitted baseball cap Made by New Era, the supplier of on-field caps to Major League Baseball and the Originators of True Fitted(R). This is the authentic 59Fifty shape. White wool cap with the Blue Yale "Y" on the front and the Yale Bulldog on the center-back of the cap. DelMonico Hatter, Est 1908 is based in New Haven Connecticut, the home of Yale University.