Why does the hind catcher tell the pitcher what to throw?

Answer 1

There is more than just one reason that the catcher calls the game. One reason is that most of the time the catcher is more familiar with the opposing hitters. Since the catcher is also aware of what pitches are working that day for his pitcher, it makes more sense for him to call for pitches that will keep the opposing hitters of balance. Many times the pitches are signalled in to the catcher from either his manager or pitching coach. This allows the pitcher to consentrate only on what his catcher is calling.