Before any player may "switch," the pitcher must throw one pitch to the hitter. After one pitch, the pitcher and batsman may switch places once every at-bat. If an injury happens, the pitcher may swap arms, but that arm may not be used again for the balance of the game. The purpose of this rule is to allow pitchers an opportunity to recover their throwing arm after each inning they work.
During World War II, many pitchers would switch arms at the end of each inning to avoid fatigue-related injuries. Today, most major league pitchers still use some type of variation on this theme; some use two sets of pitching arms while others use four or five. Pitchers who work more than one inning in an outing are given rest periods of several minutes between pitches.
In the minor leagues, it is common practice for pitchers to switch arms after each inning they work. This allows them to remain effective without being exposed to dangerous injury from using only one arm. Many high school and college pitchers also switch arms after working each side of the plate. This allows them to use different pitches for batting right-handed and left-handed hitters.
In the Major Leagues, most pitchers use some variant of a double-arm swing when they pitch. This means that they push off with both feet and rotate their upper bodies as they release the ball.
Rule 6.06 (b) So, according to the MLB regulation, the hitter cannot transfer batter boxes once the pitcher has been set: 6.06 (b) he moves from one batter's box to the other while the pitcher is in position to pitch; no additional restrictions appear to apply to switch-hitters.
After that, the hitter will select which side of the plate he will bat from. Before any player may "switch," the pitcher must throw one pitch to the hitter. After one pitch, the pitcher and batsman may switch places once every at-bat.
This week, we'll look at a far more prevalent occurrence: the switch-hitter. Whenever he pleases! Unlike the pitcher, the hitter can alternate between the left and right sides of the plate during the same at-bat. With one exception: never during the pitcher's windup. The hitter is out if he swaps sides during the windup. After that, the hitter will select which side of the plate he will bat from. Before any player may "switch," the pitcher must throw one pitch to the hitter. After one pitch, the pitcher and batsman may switch places once every at-bat.
The regulation states that a pitcher must indicate which hand he will pitch from and must use that hand for the duration of the at-bat. The sole restriction to swapping sides is that it cannot be done during a pitch. Otherwise, there is no limit to how frequently you may do this.
Rule 6.06 (b) So, according to the MLB regulation, the hitter cannot transfer batter boxes once the pitcher has been set: 6.06 (b) he moves from one batter's box to the other while the pitcher is in position to pitch; no additional restrictions appear to apply to switch-hitters.
Can he change arms during an at-bat? The simple answer is no. A pitcher must indicate which hand he will use at the start of an at-bat, according to Major League Baseball Rule 8.01(f). This is easily accomplished by merely wearing his glove on his non-throwing hand while contacting the pitching rubber.
He can change gloves while standing on the mound, but not until the ball has been thrown. If a pitcher changes gloves before the ball is released, the batter is entitled to be called out. However, if the pitcher does not have his new glove ready when he goes back to the plate after throwing one side, he is not allowed to wear that glove on that hand. In that case, he must continue to wear the glove that was removed from his previous hand.
In conclusion, a pitcher cannot switch hands or arms during an at-bat.
Even at the Little League level, where more players are likely to be ambidextrous, the same rule applies. According to Little League Rule 8.01(f), the pitcher must show the umpire, hitter, and runners which arm he/she will throw with, and the pitcher cannot swap arms during that at-bat and receives no additional prep or warmup time.
The purpose of this rule is to even out any advantage one side over the other might have due to their arm being stronger for some reason (i.e., dominant hand). There is no real disadvantage to this rule, as both sides can use all fields, but there is a practical limit as to how many batters a player can face without changing pitchers.
Little League Baseball has not announced any intention to change this rule.
A pitcher might make a swap with an outfielder and then make another switch for the next hitter. The sole distinction between using a pitcher and a position player is that a pitcher must face a batter (unless he becomes injured during the at bat). There are several ways that a pitcher can use this advantage, such as pitching around hitters who take too many pitches or throwing multiple pitches in order to get people out.
In addition to these strategies, pitchers can also exchange positions with other players on their team. For example, a pitcher could walk to first base if there were no runners on base, pick up a rock from the dirt, and throw it at a nearby intruder. The Rock Paper Scissors game is based on the premise of exchanging signals with your opponent before making a decision about what hand gesture to make. In this case, the "paper" would be used to cover the pitcher's hands while she exchanged positions with an infielder.
Finally, pitchers can also swap positions with outfielders if the coach wants to pull someone off the field. For example, if the pitcher gets hurt, the coach could remove her from the game by replacing him with one of his outfielders.
Overall, pitchers can move around quite a bit during a game. This allows them to use their skills in different situations and get people out of jams.
A pitcher may only change positions once every inning; for example, a pitcher may not adopt a position other than pitcher more than once in the same inning. However, a pitcher is permitted to change positions between innings. For example, a pitcher might be a batter during the seventh inning because there are no runners on base and then switch back to pitcher when his or her team has runners on base.
Generally speaking, a pitcher who changes positions is allowed one additional opportunity to move within the rules. For example, a pitcher who is batting during an eighth-inning at-bat because there are no runners on base is permitted one more opportunity to move within the rules before he or she is required to leave the game. In this case, the 8th-inchinger could be any number of things: a first baseman who isn't covered by a protective shield because there are men on base; a third baseman who isn't protected because there are men on base; a left fielder; etc. As long as each additional position the pitcher moves to falls under the definition of that position (e.g., as long as each new position is "in the line-up"), then they are permitted one more opportunity to do so.