John Stearns debuted on September 22, 1974, playing for the Philadelphia Phillies at Veterans Stadium; he played his final game on September 30, 1984, playing for the New York Mets at Shea Stadium.
John Baker debuted on July 9, 2008 and played his final game on May 21, 2013.
John Bateman debuted on April 19, 1963 and played his final game on October 3, 1972.
John Boozer debuted on July 22, 1962 and played his final game on October 1, 1969.
John Briggs debuted on April 17, 1956 and played his final game on September 4, 1960.
John Briscoe debuted on April 18, 1991 and played his final game on May 21, 1996.
Bill Stearns debuted on June 26, 1871, playing for the Washington Olympics at Olympics Grounds; he played his final game on June 12, 1875, playing for the Washington Nationals at Olympics Grounds.
Dan Stearns debuted on August 17, 1880, playing for the Buffalo Bisons at Riverside Park; he played his final game on October 14, 1889, playing for the Kansas City Cowboys at Exposition Park.
John kennedy aug. 1957,
John Abadie debuted on April 26, 1875 and played his final game on June 10, 1875.
John Ake debuted on May 12, 1884 and played his final game on July 15, 1884.
John Allen debuted on June 2, 1914 and played his final game on June 2, 1914.
John Anderson debuted on September 8, 1894 and played his final game on October 2, 1908.
John Andre debuted on April 16, 1955 and played his final game on July 16, 1955.
John Andrews debuted on April 8, 1973 and played his final game on September 19, 1973.
John Antonelli debuted on September 16, 1944 and played his final game on September 17, 1945.
John Atz debuted on September 24, 1902 and played his final game on September 30, 1909.
John Axford debuted on September 15, 2009 and played his final game on September 28, 2013.