The following Baseball field diagram is for those who are not so well-versed in baseball. As shown here, a baseball field is a field upon which baseball is played. As per the baseball field diagram, the infield is the area from the grass line into the home plate. It includes all the bases and is where most of the action in the baseball game takes place. The bases are perhaps the most important part of the baseball field. Here you can see the position of the Catcher, the First Baseman, Second Baseman, Shortstop, Third Baseman, and more.