In order to accomplish the third strike out, catchers tag hitters. If a swinging third strike is not caught, the hitter must be tagged out at first base. Failure to do so renders the out null and void, and the hitter becomes a base runner. The purpose of this practice is to prevent further damage to the batter's ego. Once a catcher has told the pitcher that he will take it, there is no further need for discussion. The catcher can then focus on calling the game just as effectively as if the batter were still at the plate. Catching is more than just a hobby for many people. It is a competitive sport with its own minor league system. Professional catchers make anywhere from $50,000 to $250,000 per year. In addition, they often get opportunities to play in major league games with potential paychecks attached to them. While these are not guaranteed jobs, they do provide opportunity for advancement within the organization. There are several different positions in baseball that utilize the skills of a catcher.