30 pitches P
592 feet hitten by Tony C at age 19
Click on the 'Longest MLB Games' link on the page to learn more about the longest games in MLB history.
The longest game in Chicago Cubs history was on May 17, 1927, when they beat the Boston Braves, 4-3, in 22 innings. That's 4 innings short of the longest game in MLB history, as of mid-July 2011.
The longest doubleheader, timewise, in MLB history was in 1995 between the Chicago White Sox and the Texas Rangers which lasted 7 hours 39 minutes.
30 pitches P
Hughie Jennings
There is no definitive answer since pitches per at bat has not been a consistently kept statistic, however according to the original Baseball Abstract by Bill James, Roy Thomas fouled off 22 pitches & eventually worked the count to 3 balls. This would mean he saw at least 26 pitches (22 strikes + 3 balls + 1 ball in play)
http://mlb.mlb.com/mlb/history/all_star_event.jsp?story=5
The Oakland As 20 consecutive wins 2002
The longest scoreless game in MLB history was on April 15, 1968 when the Mets and Astros went 23 scoreless innings. The Astros won the game 1-0 in the 24th inning
592 feet hitten by Tony C at age 19
Justin Verlander with 3,931 pitches
Click on the 'Longest MLB Games' link on the page to learn more about the longest games in MLB history.
In the Minor Leagues?
the ephus and screwball
In MLB history, that would be 26 innings pitched by Leon Cadore of the Brooklyn Robins and Joe Oeschger of the Boston Braves on May 1, 1920. The game ended in a 1-1 tie (called due to darkness) and is the longest game, innings wise, in MLB history.