Note that the centerfielder is positioned nearly on a straight line from the plate through second base. The leftfielder is positioned on a line between the third baseman and the shortstop, while the rightfielder is similarly positioned between the first baseman and the second baseman.
The third baseman is off the line a few paces and somewhat behind the bag, while the shortstop is deeper than the third baseman and closer to second base than third base. Similarly, the first baseman is a few paces off the line and behind the base, while the second baseman is deeper than the first baseman and closer to second base than first base.