The revision introduced Leg Before Wicket (LBW) as a means of dismissal, stating that "the striker is out if he puts his leg before the wicket with a design to stop the ball and actually prevent the ball from hitting it". The introduction of LBW stemmed from batsmen deliberately blocking the ball using their legs rather than attempting to play it with their bat, most notably a player named Ring. The Law was revised nine times between its introduction and 1831 and it was not until 1839 that the Law was amended to state that the ball had to pitch in line with the stumps in order for the batsman to be out.