Harry Schaeffer debuted on July 28, 1952, playing for the New York Yankees at Yankee Stadium I; he played his final game on August 20, 1952, playing for the New York Yankees at Yankee Stadium I.
Mark Schaeffer debuted on April 18, 1972, playing for the San Diego Padres at Jack Murphy Stadium; he played his final game on September 26, 1972, playing for the San Diego Padres at Jack Murphy Stadium.
Harry Ables debuted on September 4, 1905 and played his final game on May 5, 1911.
Harry Agganis debuted on April 13, 1954 and played his final game on June 2, 1955.
Harry Anderson debuted on April 18, 1957 and played his final game on May 5, 1961.
Harry Armbruster debuted on April 30, 1906 and played his final game on October 3, 1906.
Harry Arndt debuted on July 2, 1902 and played his final game on May 25, 1907.
Harry Arundel debuted on July 19, 1875 and played his final game on October 10, 1884.
Harry Baldwin debuted on May 4, 1924 and played his final game on April 24, 1925.
Harry Barton debuted on April 15, 1905 and played his final game on September 26, 1905.
Harry Baumgartner debuted on September 6, 1920 and played his final game on October 2, 1920.
Harry Bay debuted on July 23, 1901 and played his final game on May 3, 1908.
Harry Bemis debuted on April 23, 1902 and played his final game on August 15, 1910.