The bowler is already halfway through his celebration. Three replays later the big screen reads NOT OUT — UMPIRE’S CALL, the ball is shown clipping leg stump, and half the ground groans. If you have ever wondered how the identical delivery can be out at one end and not out at the other, umpire’s call is the reason. It is not a glitch in the broadcast graphic and it is not a soft option for a nervous third umpire. It is a deliberate rule about who has the final say when the margins get very small.
What the LBW law actually asks
Ball tracking does not decide an LBW on its own. It answers part of a question the law has already framed. Under Law 36 of the MCC Laws of Cricket, five things must all be true before a batter is out leg before wicket.
The delivery must not be a no ball. The ball must pitch in line with the stumps or on the off side — never outside leg stump. It must hit the batter without touching the bat first. The point of impact must be between the two sets of stumps, or outside off stump if the batter made no genuine attempt to play the ball. And but for that interception, the ball must have gone on to hit the wicket.
The television graphic takes the last three of those and splits them into the three panels you see: pitching, impact, wickets. Only two of those three can ever come back as umpire’s call.
Pitching is the one zone with no umpire’s call
Pitching is settled. The ball has already landed, the cameras have already recorded it, and nothing is being predicted. Cricket Australia’s explainer on the system describes the pitching zone as a flat line down the pitch bounded by the outer edge of the stumps, and the ball has to be more than half outside that line before it counts as pitching outside leg.
So the pitching panel comes back red or green. If it says the ball pitched outside leg, the batter is not out and the review is over, however dead the stumps looked afterwards.
Impact and wickets: where umpire’s call lives
The other two panels work on a threshold rather than a straight yes or no. According to that same explainer, umpire’s call applies when between one and fifty per cent of the ball sits inside the zone. Above half, the evidence is strong enough to overrule the man in the middle. Below that, it is a marginal picture, and the on-field decision stands.
That is the part people miss. On a marginal reading, the third umpire is not saying the batter was not out. He is saying he does not have enough to overturn anything. Give the same ball out on the field and the same graphic sends the batter back.
Why the buffer exists at all
The obvious assumption is that the margin covers the technology’s error. It does not, quite. Wisden put the umpire’s call zone at about half a ball’s width from the stumps, roughly 35mm, while quoting Hawk-Eye’s inventor putting the technology’s worst-case error at five to ten millimetres. The buffer is several times wider than the error it would need to absorb.
The reason is authority. As that piece puts it, the review system exists to remove the howler, not to re-umpire the game. Strip out the buffer and every LBW decision on the field becomes provisional, waiting for a machine to confirm it.
The 2021 change you may have missed
The wickets zone got slightly bigger a few seasons ago. In April 2021 the ICC approved a set of protocol changes, and among them, the wicket zone was extended to include the bails rather than stopping at the top of the stumps. A ball predicted to shave the bails now registers as hitting.
That same round of changes gave captains something useful. Before burning a review on a turned-down LBW appeal, a captain may ask the on-field umpire whether he judged that the batter made a genuine attempt to play the ball — the answer decides whether the impact-outside-off route is even open.
Your review usually survives it
Here is the practical bit for anyone watching a captain hesitate at the end of an over. A team loses a review only when the third umpire confirms the original decision on the evidence. A 2017 change means a verdict that reverts to umpire’s call leaves the review intact.
That changes the maths on a marginal shout. A genuinely close LBW is a cheap review, because the most likely bad outcome is that nothing happens and you still have the review in hand. The expensive reviews are the hopeful ones — the ball that pitched a foot outside leg, the inside edge everyone in the ground heard except the bowler.
Watching it properly next time
Take one delivery and run it in your head. A left-arm quick angles the ball in, it pitches just in line, it strikes the front pad low, and tracking says the ball is clipping the outside of leg stump. Panel one is green, panel two is green, panel three is umpire’s call.
Given not out on the field, the batter carries on. Given out on the field, he walks off. Nothing about the ball changed between those two versions. What changed is which decision the marginal reading was asked to overturn — and that is the whole design, working exactly as intended rather than failing.
Once you know that, the graphic stops being a verdict and starts being what it actually is: a record of how close the thing was. And if you want the other half of the picture — why the ball was moving that way before it ever reached the pad — start with why a cricket ball swings, and why it suddenly stops.
Umpire’s call will still annoy you when it goes against your side. It should. But it is not the technology hedging. It is the game deciding that on the tightest margins, the person standing twenty-two yards away with the naked eye still gets the last word.
Photo by Engineer John on Pexels
