John Halama debuted on April 2, 1998, playing for the Houston Astros at Astrodome; he played his final game on June 10, 2006, playing for the Baltimore Orioles at Oriole Park at Camden Yards.
John Halama played in 35 games at pitcher for the Oakland Athletics in 2003, starting in 13 of them. He played for a total of 326 outs, equivalent to 12.07 9-inning games. He made 9 putouts, had 19 assists, and committed one error, equivalent to .083 errors per 9-inning game. He had one double play.
John Halama played in 30 games at pitcher for the Boston Red Sox in 2005, starting in 1 of them. He played for a total of 131 outs, equivalent to 4.85 9-inning games. He made 2 putouts, had 7 assists, and committed one error, equivalent to .206 errors per 9-inning game. He had one double play.
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.