Walter Joseph Kellner (April 26, 1929 – June 19, 2006) was an American 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  and .
Walter Joseph Kellner, born on April 26, 1929, died on June 19, 2006, was an American relief pitcher in Major League Baseball with a career of eight years. He played three games for the Philadelphia Athletics.