Baseball is a bat-and-ball sport played on a field by two teams versus each other. In baseball, a player on one team throws a small round ball at a player on the other team, who tries to hit it with a bat. Then the player who hits the ball has to run around the field. Players get points by running around in a full circle around three points on the ground called bases, to back where they started, which is called home plate. They have to do this without getting caught by the players on the other team.