The sport played on a diamond-shaped field is baseball. In baseball, two teams compete to score runs by hitting a ball with a bat and running around a series of bases positioned in a diamond shape. The field consists of an infield, which contains the diamond, and an outfield, which extends beyond the infield. Each team takes turns batting and fielding, and the game is divided into innings. The team with the most runs at the end of the game wins. Baseball is a popular sport in the United States and has a rich history, including professional leagues like Major League Baseball.