How can you say that a catcher is not a big determinate on how a pitcher will performe. Yes, you can say that a pitcher has the final decision on what type of pitch to throw every time. However, a pitcher must trust their catcher to work fast if they choose, and must know how to set up a batter. The catcher is also the captain on the field. A good catcher comands the attention of every other fielder to rely on getting set up to make the plays. A pitcher must know that they can throw the ball in the dirt and the ball will be blocked, and that they dont have to rush everything if someone is on base because their catcher will throw them out if they try and steal. A catcher can also help get strikes that otherwise would be balls, by good frame work with the glove. The ability to make the routine plays (bunts, backing up, blocking, and recieving) are only the begining. If you talk to any catcher you also know that they are an extended pitching coach. They have to know their pitchers and be able to relax them and let them pitch, if they see something wrong they can run out and mention it. There are a million things a catcher can do to help influence a game.