The wicket-keeper in the sport of cricket is the player on the fielding side who stands behind the wicket or stumps being guarded by the batsman currently on strike. The wicket-keeper is the only member of the fielding side permitted to wear gloves and external leg guards. The wicket-keeper may also wear a helmet with a mesh face guard to help protect from injury.
It is essentially a specialist role although a keeper is occasionally called upon to bowl, in which case another member of the fielding side temporarily keeps wicket. The role of the keeper is governed by Law 40 of the Laws of Cricket.
Initially, during the bowling of the ball the wicket-keeper crouches in a full squatting position but partly stands up as the ball is received. Australian wicket-keeper Sammy Carter (1878 to 1948) was the first to squat on his haunches rather than bend over from the waist (stooping).
The keeper's major function is to stop deliveries that pass the batsman (in order to prevent runs being scored as 'byes'), but he can also attempt to dismiss the batsman in various ways:
A keeper's position depends on the bowler: for fast bowling he will squat some distance from the stumps, in order to have time to react to edges from the batsman, while for slower bowling, he will come much nearer to the stumps (known as "standing up"), to pressure the batsman into remaining within the crease or risk being stumped. The more skilled the keeper, the faster the bowling to which he is able to "stand up", for instance Godfrey Evans often stood up to Alec Bedser.
Wicket-keeping is a specialist discipline and it requires training consistent with the level expected of a specialist batsman or bowler. However, the modern-day keeper is also expected to possess reasonable batting skill, suiting him for the middle order at least. Wicket-keepers who are also capable of batting at the top of the order are known informally as keeper/batsmen.