Center

From Hoopedia

The center is relied upon at both ends of the floor. On offense, the center must be able to score inside (close to the basket), while on defense, he must block shots and rebound. The center is usually the tallest player on the team, with most NBA centers being close to seven feet in height, if not taller. The center is the #5 position on the floor and is often referred to as a big man or post player.