Ralph Mauriello debuted on September 13, 1958, playing for the Los Angeles Dodgers at Los Angeles Memorial Coliseum; he played his final game on September 27, 1958, playing for the Los Angeles Dodgers at Los Angeles Memorial Coliseum.
Ralph Edwards debuted on September 17, 1915, playing for the Philadelphia Athletics at Shibe Park; he played his final game on September 17, 1915, playing for the Philadelphia Athletics at Shibe Park.
Ralph Erickson debuted on September 11, 1929, playing for the Pittsburgh Pirates at Forbes Field; he played his final game on May 31, 1930, playing for the Pittsburgh Pirates at Forbes Field.
Ralph Kiner debuted on April 16, 1946, playing for the Pittsburgh Pirates at Forbes Field; he played his final game on September 25, 1955, playing for the Cleveland Indians at Cleveland Stadium.
Ralph Judd debuted on October 2, 1927, playing for the Washington Senators at Griffith Stadium I; he played his final game on May 7, 1930, playing for the New York Giants at Polo Grounds IV.
Ralph Citarella debuted on September 13, 1983, playing for the St. Louis Cardinals at Busch Stadium II; he played his final game on July 10, 1987, playing for the Chicago White Sox at Comiskey Park.
Ralph Beard debuted on June 29, 1954 and played his final game on September 9, 1954.
Ralph Bell debuted on July 16, 1912 and played his final game on July 22, 1912.
Ralph Birkofer debuted on April 25, 1933 and played his final game on July 11, 1937.
Ralph Botting debuted on June 28, 1979 and played his final game on October 5, 1980.
Ralph Branca debuted on June 12, 1944 and played his final game on September 7, 1956.
Ralph Brickner debuted on May 4, 1952 and played his final game on September 17, 1952.
Ralph Bryant debuted on September 8, 1985 and played his final game on October 4, 1987.
Ralph Buxton debuted on September 11, 1938 and played his final game on September 23, 1949.
Ralph Caldwell debuted on September 10, 1904 and played his final game on July 5, 1905.
Ralph Capron debuted on April 25, 1912 and played his final game on May 8, 1913.
Ralph Citarella debuted on September 13, 1983 and played his final game on July 10, 1987.
Ralph Comstock debuted on August 26, 1913 and played his final game on September 1, 1918.