High Quality Content by WIKIPEDIA articles! Walter Joseph Kellner (born April 26, 1929 in Tucson, Arizona) is a former relief pitcher in Major League Baseball who had an eight-year professional career, and played three games in the Major Leagues for the Philadelphia Athletics between 1952 and 1953 . Kellner, 6 feet tall and weighing 200 pounds during his career, batted and threw right-handed.