Infield/ˈɪnfiːld/ Definition 1 of 3Pro Tip 1/3Baseball Field Refers specifically to the square layout between first, second, third base and home plate. The infield must be well-maintained for a smooth game. Pro Tip 2/3Fielding Position Positions played by the defensive team within this area, excluding the pitcher and catcher. He excels in playing the infield positions. Pro Tip 3/3Close Play Action happening here is often a close play, meaning the runner can be easily tagged out. A fast throw to the infield could lead to an out.