John Poff debuted on September 8, 1979, playing for the Philadelphia Phillies at Veterans Stadium; he played his final game on October 5, 1980, playing for the Milwaukee Brewers at County Stadium.
John Poff played in 7 games at designated hitter for the Milwaukee Brewers in 1980, starting in none of them. , equivalent to 0 errors per game (estimate based on total games played in).
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.
John Baker debuted on July 9, 2008 and played his final game on May 21, 2013.