What is a closer in baseball?

A closer in baseball is a relief pitcher who specializes in finishing games. Their primary responsibility is to preserve a lead by getting the final outs of a game. They typically come into the game in the ninth inning, though they may be called upon earlier if there is a critical situation. Closers are known for their ability to throw hard and to locate their pitches well, especially in high-pressure situations. They are often used in save situations, when their team is ahead by three runs or fewer. Closers may also be used in tie games on the road, where they can keep the game from going into extra innings. Some of the most famous closers in baseball history include Mariano Rivera, Trevor Hoffman, and Goose Gossage.