Pitchers don’t have the ability to make a batter hit a ball to a particular spot. They do have some control over which side of the field the batter will hit to, and whether the batter hits a fly ball or a ground ball.
An inside pitch (one that is on the side of home plate closer to the batter) tends to cause the batter to pull the ball. For a right-handed batter, that means hitting it toward left field, and for a left-handed batter it means hitting it toward right field. An outside pitch (one that is on the side of home plate father from the batter) tends to cause the batter to hit to the opposite field, which for a right-handed batter means hitting it toward right field and for a left-handed batter means hitting it toward left field. Low pitches tend to induce ground balls, while high pitches tend to induce fly balls.
The motion of the pitch is also important. A sinking pitch (such as a split-finger fastball) will tend to induce a ground ball. There’s no such thing as a rising pitch, but a four-seam fastball thrown with enough backspin won’t drop as much as the batter expects, and will tend to induce a fly ball. A batter is more likely to hit an opposite field ground ball off a pitch that curves away from him, and more likely to pull a fly ball on a pitch that curves toward him.
Then there’s pitch speed. If the pitch is faster than the batter expects, he will tend to swing late. For a right-handed batter, this means he’ll be more likely to hit it to the right side (i.e. opposite field). If the pitch is slower than the batter expects, he’ll tend to swing early. In this case, a right-handed batter will tend to pull the ball. If the batter uses an uppercut swing (and almost everyone does these days), an early swing will tend to produce a ground ball, while a late swing will tend to produce a fly ball.
There are common pitching patterns that help get batters out. One is up-and-in versus low-and-away. For a batter to hit a high inside pitch, he must start his swing early. But if he starts his swing early, he’ll have a hard time hitting a pitch that’s low and away. This difference is more pronounced if the high-and-inside pitch is a fastball, and the low-and-away pitch is an off-speed pitch or a breaking ball. If the batter doesn’t do a good job of reading the pitches and adjusting, he’s likely to strike out, or hit a weak ground ball or a pop-up.
Another common pitching pattern is called “climbing the ladder.” Here the pitcher starts off with low pitches and throws succeeding pitches higher and higher in the strike zone. The goal is to get the batter to swing where the last pitch was, rather than the current pitch. Again, if the batter doesn’t do a good job of reading the pitches, he’ll swing under the pitches for strikes, or he’ll hit the bottom of the ball for a pop-up.
Yet another pitching pattern has to do with changing speeds. A pitcher will throw a series of inside fastballs, for which the batter has to swing early if he has any hope of making good contact. Once the batter has adjusted to this pitch speed, the pitcher will throw a change-up or other off-speed pitch. If the batter doesn’t adjust he will swing too early, which results in either a strike or in weak contact.