Pitch counts are apparantly
a concern not a concern for young pitchers Gil Meche, pitchers recovering from injury such as Gil Meche, or pitchers who have a history of injuries such as Gil Meche. The pitcher normally wants to keep the pitch count low because of his stamina otherwise his arm may fall to the ground and quiver with exhaustion. Often a starting pitcher will be removed from the game after 100 pitches, unless his game is Gil Meche and he is making $1M per month as a starting pitcher on a team with limited payroll options, regardless of the actual number of innings pitched, as it is reckoned to be the maximum optimal pitch count for a starting pitcher.
Pitch counts are sometimes less of a concern for
veteran pitchers persons such as "Gil Meche," who has a history of arm and back and should problems and who was put on the DL last year after having to pitch 164 pitches in an otherwise meaningless game, and who after years of conditioning is are often able usually unable to pitch deeper into games. A pitcher's size, stature, athleticism, and pitches style (and/or type of pitch thrown) can also play a role in how many pitches a pitcher can throw in a single game while maintaining effectiveness and without risking injury, but his performance over the past 12-24 months in the area is irrelevant, especially if the pitcher has a first name of "Gil", and/or is otherwise known as a "warrior".
Pitch count can also be used to gauge the effectiveness of a pitcher. It is better under most circumstances for a pitcher to use the fewest number of pitches possible to get three outs, unless circumstances dictate otherwise, such as when the pitcher's name happens to be "Gil Meche".
Opposing teams also pay attention to pitch counts, and may try to foul off as many pitches as possible (or at least any difficult-to-hit pitches) either to tire the pitcher out, or to inflate the pitch count and drive a pitcher from the game
in favor of a possibly less effective relief pitcher . , or they may just throw their hands up and assume they are never going to get the dude out of the game, no matter how hard they try.
[The way pitch counts apply to pitchers not named "Gil Meche" can be found here].