A wicketkeeper’s early movement can affect the delivery even when the bowler’s feet are correctly placed. The key question is not whether the keeper moves forward at all, but whether the keeper is wholly behind the striker’s wicket at the relevant point of the delivery.
When the keeper’s position becomes an offence
From the moment the ball comes into play, the keeper must remain wholly behind the striker-end wicket until one of the specified events occurs: the ball touches the striker’s bat or person, passes the wicket, or the striker attempts a run. If the keeper is ahead too soon, the striker-end umpire signals a No-ball. This is a fielding-position offence, not a punishment for the bowler’s front-foot position. See the MCC Law on the wicket-keeper.
Fictional worked example
Hypothetical example: A fictional keeper, Mira, starts behind the stumps. As the bowler delivers, she moves forward and her gloves cross in front of the striker-end wicket while the ball is still travelling towards the batter. The batter does not touch the ball, does not attempt a run, and the ball has not passed the wicket. Mira’s early position breaches the restriction, so the umpire calls a No-ball. Catching the ball is not required for this position infringement.
Why timing changes the outcome
Suppose the keeper stays behind the wicket until the ball touches the striker’s bat, and then steps forward to gather it. The keeper-position restriction has ended, so that movement is not a No-ball under this particular rule. Likewise, merely moving forward is not automatically illegal if the keeper remains wholly behind the wicket. Other Laws can still apply to a separate incident during that delivery.
Playing conditions for a particular competition may modify how Laws are applied. For a basic score or match-reading check, first identify the keeper’s position, then ask whether one of the ending events had already occurred.
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