In 1 Corinthians 12, Paul begins a speech on the church being the body of Christ. Each part is important, and all are needed for the body to function properly. It is the same for a baseball team. There are nine positions on the playing field, and each is as important as the next. Everyone cannot play the pitcher's position. It takes all nine positions playing together to make a team.
Baseball is a well organized sports. Each player is positioned so that the entire field is covered. The right fielder is just as important as the pitcher, and without a catcher, the pitcher's pitches would bounce off the backstop, and runners would steal bases at will. The same is true in the church. Every member is important and every task is needed to fulfill the work of spreading the gospel.
Pitchers are the premier players on the field. They are involved in ever play of the game. However, everyone cannot play the pitcher's position. Pitcher's have certain skills that make them great pitchers, but in the same manner, the pitcher does not have the skills needed to play right field. In the church, there are those who want the limelight. They want to preach, teach or evangelize, but do not possess the gifts for these jobs. On the same note, preachers, teachers, and evangelist don't usually possess other gifts that are needed to keep a church well balanced.
When the ball is hit and put into play, the pitcher usually doesn't field the ball. He relies on the other eight player on the field to catch the ball and make a play. Winning the game is a team effort. In the church, winning souls for Christ is a team effort. The pastor and deacons cannot do it all. It takes the entire church working together.
Paul encouraged the church at Corinth to use their gifts to work together as a body to do the work of Christ. It takes an effort on all to do the work needed. If the catcher wants to pitch, does that make him no longer a catcher? If the pitcher says he no longer needs a catcher, can he still win the game? It takes a team effort, both on the ball field and in the church to accomplish the task.