Dictionary

Centre-backs are often tall, with good heading and tackling ability. An ability to read the game well is also a distinct advantage. Sometimes, particularly in lower leagues, centre-backs concentrate less on ball control and passing, preferring simply to clear the ball in a "safety-first" fashion. However, there is a long tradition of centre-backs having more than just rudimentary footballing skill, enabling a more possession-oriented playing style. The position was formerly referred to as "centre-half." In the early part of the 20th century, when most teams employed the 2-3-5 formation, the row of three players were called halfbacks. As formations evolved, the central player in this trio (the centre-half), moved into a more defensive position on the field, taking the name of the position with them. (Wikipedia)