 Although no serious injuries arose from any short @-@ pitched deliveries while a leg theory field was set , the tactic still led to considerable ill feeling between the two teams , with the controversy eventually <unk> into the diplomatic arena . Over the next two decades , several of the Laws of Cricket were changed to prevent this tactic being repeated . Law 41 @.@ 5 states " At the instant of the bowler 's delivery there shall not be more than two fielders , other than the wicket @-@ keeper , behind the popping <unk> on the on side , " commonly referred to as being " behind square leg " . Additionally , Law 42 @.@ 6 ( a ) includes : " The bowling of fast short pitched balls is dangerous and unfair if the umpire at the bowler 's end considers that by their repetition and taking into account their length , height and direction they are likely to inflict physical injury on the striker " . 
