One day after he was hit in the head by a foul ball while sitting in the dugout, catcher Keibert Ruiz was placed on the injured list by the Washington Nationals on Tuesday with what the team is calling a head contusion. Washington called up Drew Millas from Triple-A Rochester to replace Ruiz on the roster. Teammate Josh Bell’s foul ball hit Ruiz on a bounce and the catcher placed both hands on his head and immediately left the bench. Riley Adams replaced him behind the plate. After Washington’s 10-6 win over the host San Diego Padres, manager Dave Martinez said the 26-year-old Ruiz was headed for a CT scan. “The ball hit him pretty solid,” Martinez said. “He had a nice lump on the side of his