What Is DRS in Cricket? What It Means and How Many Reviews You Get

So what is DRS in cricket, really? It stands for Decision Review System, the tech that lets players challenge an umpire's call on the field. It's become one of those things you really need to understand if you follow cricket closely, or if you're into online cricket betting, since one overturned review can flip a match in seconds. Here's the thing though: the number of reviews each team gets has actually changed since DRS first showed up, and a lot of what's out there online still quotes the old numbers.

DRS Full Form, and What It Actually Means

DRS full form is Decision Review System, that's the whole thing. If a batter gets given out, or a fielding captain thinks a "not out" call was wrong, they've got 15 seconds to signal for a review, hands up in a "T" shape. From there a third umpire, sitting in a booth full of screens, checks it with ball-tracking and edge-detection tech before confirming or overturning the on-field call.

That's the short version of what is DRS in cricket. The longer version is basically everything below.

How Many Reviews Do Teams Actually Get Now?

This is where a lot of older articles get it wrong, in the other direction. Right now: 3 unsuccessful reviews per innings in Tests, 2 per innings in ODIs and T20Is. Those numbers actually went up during the COVID-19 era, in July 2020, to account for less experienced umpires potentially standing in, and the higher counts simply became permanent afterward.

Only unsuccessful reviews count against that limit though. Get it overturned, you keep the review. Land on an Umpire's Call, meaning the tech showed it was too close to flip, the original decision stands, but you don't lose anything either. And reviews don't roll over between innings. Whatever's left unused when the first innings ends is just gone.

Not Every Decision Can Be Reviewed

Once you know what is DRS in cricket at a basic level, it helps to know its limits too. DRS covers LBW calls, stumpings, and catches, caught behind or bat-pad, the moments where tech genuinely sees something an umpire's eye can miss. It doesn't cover no-balls anymore (third umpire checks those automatically now), leg byes, or boundary contact, also automatic.

What's Actually Doing the Work Behind DRS

Three tools, really. Hawk-Eye tracks the ball's flight with a bunch of high-speed cameras, projecting where it would've gone if it hadn't hit the batter, the backbone of any LBW call. UltraEdge (people still call it Snickometer sometimes, old habits) uses stump mics sensitive enough to catch the faintest click of ball on bat. Hot Spot used infrared to show heat where bat met ball, but it's barely used anymore, too expensive to run regularly.

One More Thing That Changed

Even the tech itself keeps shifting. As of 2026, the "wicket zone" Hawk-Eye uses for LBW calls got redefined, used to be a flat box based on stump width and height, now it actually maps the real 3D shape of the stumps and bails. Small tweak. But it shows DRS isn't some fixed thing from 2008, it's still being adjusted.

A Few Things People Get Wrong

Not every close call is reviewable, only specific dismissals qualify, wides and leg byes generally don't. A rejected review doesn't always cost you either, only an officially "unsuccessful" one counts against the limit, an Umpire's Call is free. Unused reviews definitely don't carry into the next innings, each one starts fresh. And no, DRS hasn't wiped out umpiring mistakes completely, it's cut down the big obvious howlers a lot, but tight calls decided by Umpire's Call still leave room for judgment.

Why Knowing What Is DRS in Cricket Actually Matters If You're Betting

A review can turn a match around in about ten seconds. A batter given out, then reinstated, can go on to rebuild an entire innings. A wicket that looked settled until DRS said otherwise can swing live markets almost instantly. That's exactly why DRS moments are worth watching closely if you're doing online cricket betting on Arena365, in-play odds tend to move faster around a review than almost anything else happening in the game. Understanding what is DRS in cricket, and how it actually plays out, is genuinely useful before you place a bet on a tight match.