1. According to the batting habit of the catcher to the batter, decide what kind of ball to throw and what position to throw.

Most pitchers obeyed, but did not agree to shake their heads and let the catcher change. This must be communicated well, otherwise it is easy to fall badly.

2. When there is base runner on the first and third bases, if the coach (running coach) on the first and third bases wants to contain or take other actions (such as instructing the pitcher).

Throw a fast low ball to shorten the time, so that the catcher can pass the base faster and prevent stealing the base.

With infield defenders, the catcher must accurately convey the signal to the pitcher and defender before the pitcher throws the ball.

3. Stand up and use clear gestures to inform and convey the coach's tactical instructions to pitchers and all defenders.

So this is why it is often said that the catcher is the conductor on the court.