Yes. A pitcher may be removed and replaced by another at any point during a defensive half inning, regardless of if the pitcher has commenced an at bat or not.
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Above answer is not completely correct. The starting pitcher, and any replacement pitcher, must pitch to at least one batter before that pitcher can be removed...except due to injury or illness.
Yes, a pitcher may be replaced at any time with one exception. That exception isifthe pitcher has just entered the game and the batter is the first batter he is pitching to. The rule states a pitcher must pitch one full at bat and applies to both starting and relief pitchers. Of course, if the pitcher suffers an injury the umpires can rule that he may be replaced regardless of whether the batter is the first batter the pitcher is pitching to.
No, the new pitcher inherits the existing count.
If the batter got on base with the original pitcher and he scores of the new pitcher, the previous pitcher is charged with the earned run.
A Pitcher's time limit in pitching to a batter doesn't depend solely on the batter but also on when he (the Pitcher in question) has the baseball in his possession however when he does have the ball in his possession and is on the mound then he has 12 seconds to deliver it to the plate however an exception to this rule is when runners are on base.
No, why should the batter be penalized for "staying alive" by fouling off pitches. The classic confrontation between pitcher and batter is the heart of baseball.
you have to keep one foot on it while you're pitching so you don't get closer to the batter.
Rule 8.01 Legal Pitching Delivery goes into detail about the only two legal pitching positions (the set position and the wind-up) but the short answer is yes, not only must the pitcher be touching the mound, his foot must be touching the pitcher's plate (or rubber) until the ball is delivered to the batter.
you do not say that the pitcher is pitching a perfect game
A pitcher who enters the game must pitch at least one full at bat. The only exception to this is if the pitcher suffers an injury during warmups or while pitching to the first batter that the umpires deem serious enough to warrant medical attention. Then the pitcher may be replaced before pitching one full at bat.
The main difference between pitching in the American League and the National League is that in the American League, the Pitcher has to pitch to all nine batters. In the National League, the Pitcher has to pitch to nine batters as well but the batter in the ninth spot is the opposing Pitcher and Pitchers aren't typically very skilled at batting.
Yes, you can. The only exception is for the first batter of the game and for the first batter to be faced by a reliever. According to Rule 3.05(a), the starting pitcher shall pitch to the first batter or any substitute batter until such batter is put out or reaches first base, unless the pitcher sustains injury or illness which, in the judgment of the umpire-in-chief, incapacitates him from pitching. And according to Rule 3.05(b), if the pitcher is replaced, the substitute pitcher shall pitch to the batter then at bat, or any substitute batter, until such batter is put out or reaches first base, or until the offensive team is put out, unless the substitute pitcher sustains injury or illness which, in the umpire-in-chief's judgment, incapacitates him for further play as a pitcher.
With a pitcher pitching to a batter who is trying to hit the ball and it starts with either him getting out, getting a hit, or getting walked.