Pitcher: Encyclopedia II - Pitcher - Pitching in a game

Pitcher - Pitching in a game

Effective pitching is vitally important in baseball. In baseball statistics, for each game, one pitcher will be credited with winning the game, and one pitcher will be charged with losing it. However, pitching is also physically demanding, especially if the pitcher is throwing with maximum effort. A full game usually involves 120-170 pitches thrown by each team, and most pitchers begin to tire before they reach this point. As a result, the pitcher who starts a game often will not be the one who finishes it, and he may not be recovered enough to pitch again for a few days. The act of throwing a baseball at high speed is very unnatural to the body and somewhat damaging to human muscles, thus pitchers are very susceptible to injuries, soreness, and general pain.

Teams have devised two strategies to address this problem: rotation and specialization. To accommodate playing nearly every day, a team will include a group of pitchers who start games and rotate between them, allowing each pitcher to rest for a few days between starts. Also, teams have additional pitchers reserved to replace that game's starting pitcher if he tires or proves ineffective. These players are called relief pitchers, relievers, or collectively the bullpen. The relief pitchers often have even more specialized roles, and the particular reliever used depends on the situation. Many teams designate one pitcher as the closer, a relief pitcher specifically reserved to pitch the final inning or innings of a game when his team has a narrow lead, in order to preserve the victory. Generally, relief pitchers pitch fewer innings and throw fewer pitches than starting pitchers, but may be able to pitch more frequently without needing multiple days to recover.

A skilled pitcher often throws a variety of different pitches in order to prevent the batter from hitting the ball well. The most basic pitch is a fastball, where the pitcher throws the ball as hard as he can. Some pitchers are able to throw a fastball at a speed of over 100 miles per hour (160 km/h). Other common types of pitches are the curveball, slider, changeup, forkball, split-fingered fastball, and knuckleball. These generally are intended to have unusual movement or to deceive the batter as to the rotation or velocity of the ball, making it more difficult to hit. Very few pitchers throw all of these pitches, but most use a subset or blend of the basic types. Some pitchers also release pitches from different arm angles, making it harder for the batter to pick up the flight of the ball. (See List of baseball pitches.) A pitcher who is throwing well on a particular day is said to have brought his "good stuff".

Adapted from the Wikipedia article "Pitching in a game", under the G.N U Free Docmentation License. Please also see http://en.wikipedia.org/wiki