The Arm Ball and Off-Spinner's Variations: Creating Doubt in the Batsman
The arm ball (a delivery that goes straight rather than turning, released like a seam delivery) is the off-spinner's primary variation against left-handers. Combined with the doosra, carrom ball, and slider, modern off-spinners have created a variation toolkit that makes them threats regardless of surface conditions. This guide covers these variations and how they are bowled.
The arm ball is an off-spinner's delivery that does not spin — it is released from the same position as the off-break but with the wrist rotated forward (rather than to the off side) so the ball goes straight with the seam (like a fast-medium delivery). The arm ball is most effective against left-handers: an off-spinner's standard delivery turns into the right-hander (spinning from off stump toward leg stump) — left-handers face the ball coming away from them. The arm ball against a left-hander goes straight in rather than away — trapping them LBW or bowling them through the gate when they play for the spin that does not arrive.
The Doosra
The doosra (meaning 'the other one' in Urdu/Hindi) is an off-spinner's delivery that turns the opposite way to an off-break — turning away from the right-handed batsman (like a leg-break) rather than into them. Saqlain Mushtaq (Pakistan) is credited with inventing the doosra in the late 1990s; Muttiah Muralitharan mastered it; Harbhajan Singh used it to notable effect against Australia in the 2001 Test series. The doosra requires a wrist position that creates a front-on release — which many bowling action analysts have questioned as an elbow extension (possibly illegal under the 15-degree bend limit in the Laws). Muralitharan's bowling action was repeatedly tested and cleared; some other bowlers' doosras have not been cleared.
The Slider
The slider is primarily a leg-spinner's variation (also used by some off-spinners): released with backspin (the seam rotating backwards toward the batsman rather than sideways), the slider skids through at low trajectory — staying lower than the standard leg-break that bounces. It is used to trap batsmen who play back (assuming the ball will bounce — the slider's low trajectory means the ball hits the pad rather than the bat). Shane Warne's flipper was a specific version of the slider: bowled slightly faster with more backspin, creating an exceptionally low skidding delivery that produced LBW wickets against batsmen who were driving forward (incorrectly reading it as a full delivery).
Reading Spin Variations
Batsmen attempt to read spin variations from: the bowler's wrist position at release (the wrist facing down = off-break; wrist facing up = doosra/googly — but elite bowlers disguise the wrist position at the release point); the ball's flight and trajectory (the arm ball dips slightly later than the off-break; the doosra has a slightly different flight because the wrist rotation creates a different rotation axis); and the ball's behaviour after landing (the arm ball does not spin; the off-break spins to leg — batsmen must identify the variation in the air before the ball pitches to react correctly). The best batsmen against spin (Sachin Tendulkar, Joe Root, Kane Williamson) read wrist position before release — the least skilled identify the variation after the ball has pitched, leaving insufficient time to adjust.
Frequently asked questions
What is a doosra in cricket?
A doosra is an off-spinner's delivery that turns in the opposite direction to the standard off-break — spinning away from the right-handed batsman (like a leg-break) rather than into them. The name means 'the other one' in Urdu/Hindi. Saqlain Mushtaq (Pakistan) is credited with inventing it; Muttiah Muralitharan mastered it to devastating effect. The doosra is difficult to bowl legally (it requires wrist rotation that can stress the elbow joint beyond the 15-degree legal limit) — some versions have been reported for suspect actions. When bowled legally and disguised well, it is the most dangerous off-spin variation because batsmen expect off-spin to turn one way and the doosra does the opposite.
What is an arm ball in cricket?
An arm ball is a delivery from an off-spinner or left-arm spinner that does not turn — it goes straight through like a seam delivery rather than spinning. Released with the seam straight (like a fast bowler's delivery), the ball dips slightly late and skids through at the normal batting height. Effective against: left-handers (the ball goes straight into their stumps rather than spinning away); batsmen who are playing for spin (they may play outside the ball's actual trajectory expecting spin that does not arrive); and on surfaces where the expected spin does not materialise (the arm ball deceives batsmen playing for turn that isn't coming). Bishan Bedi (India) and Derek Underwood (England) were famous for using the arm ball as a primary weapon alongside their main spinning delivery.
What is a carrom ball in cricket?
A carrom ball is a bowling variation where the ball is released by flicking it between the thumb and the bent middle finger (like a carrom piece in the board game carrom). The flicking action creates variable spin — the ball can go straight, spin as an off-break, or spin as a leg-break depending on the specific flick direction. R Ashwin (India) is the most famous carrom ball exponent — he developed it specifically to dismiss left-handed batsmen. The carrom ball is legal because the release mechanism (flicking with the fingers) does not straighten the elbow beyond the 15-degree limit — it uses wrist and finger movement rather than elbow rotation.