Many times in international matches we hear commentators use term “reverse swing” through the end of an innings. But most of the people don’t know what it is, except for grasping the fact that the ball somehow tends to reverse in a certain way when it gets old. Reverse swing is essentially an art. It is generally applied when the ball is old and rough with the help of extreme pace, even moderate sometimes (if executed properly), and get it to work lethally.
But before a bowler can think of reverse-swing, he must first go through the basic procedure of tracing his steps toward the root of swing, as the ability to swing is an art in itself.
What is Swing?
When a ball is released from the wrist, it habitually moves in the air and bounces directly proportional, or sometimes vice versa, towards or away from a batsman when a pace bowler is in operation. Swing merely consists of aerodynamics, which I’ll come to later.
It is a known fact that most fast bowlers strive for this sort of variation because it is a serious cause for concern for batsmen. Imagine yourself driving on a lane and encountering a vehicle moving to the left, but suddenly in full speed it decides to move in your direction. The judgment and reflexes then, of you as a batsmen or a natural human being, rely on your instinct; sometimes you survive the variation, sometimes you don’t. Batsmen gradually become accustomed to playing general swing, which is easier to judge and also gets predictable. Such swing is likely to occur in the first ten or 15 overs of a match when the ball is still hard.
However, recently, with the game constantly evolving, new-ball bowlers have discovered a way of swinging the older ball, especially when it’s dusty and scruffy. The movement, in this case, makes it more difficult for the batsmen to judge. But to attain it, there are a number of factors to consider.
The Role of the Cricket Ball
If you see a lot of cricket, or play in clubs, you will realize that fielders continuously shine the ball with their trousers or towels. The cricket ball has two sides across the seam. When players shine the ball, they deliberately leave one side rough while adding glossy sparkle to the other. The rubbing helps one side of the ball smoothen while the opposite is deliberately left to deteriorate through routine wear and tear. This is where aerodynamics come in, because the dual surface enhances a change in rhythm of flight from the bowler’s wrist to the batsman. The aerodynamics mean that the shiny side is prone to travel quicker through the air while the rough side works as a break pushing the ball in its direction.
The Seam Position
The stitching you notice around the cricket ball is called a seam. The seam acts like a helm for fast bowlers. All fast bowlers grip the seam vertically, with the middle and index fingers on either side, with the ball resting in the third finger and thumb. The idea of enhancing your swing is to hold the seam as straight as possible: The straighter the seam is at the point of delivering the ball, the greater the chance to swing it. And if the ball is old with one side shiny, the chances of variation will increase.
What are inswing and outswing?
Most bowlers get confused here. To move a ball in a typical fashion away from a left-handed batsman, the rougher side of the ball will be facing leftwards at point of release: notice the seam should be darting toward second slip. And it is understandably the other way round for an inswinging delivery; the rough side should be on right at point of release and the seam should be darting at an imaginary leg slip.
What is reverse-swing?
Once the ball turns older and more tattered, it will instigate a movement in the opposite route to where it would originally swing, disregarding the change in the bowler’s grip. For example, with the grip for an outswinger, the ball will move towards the batsman in the air while an inswinger will move away from the bat. Such variations usually occur very late after the ball is released, therefore it is extremely difficult for batsmen to judge the deviation in split seconds. Batsmen usually pick the changes in direction while in the air to confront the issue. It is not easy to execute revere swing, as they say bowlers need to be pace it at a minimum of 80 mph or above. Former Pakistan international Sarfraz Nawaz is known to have founded reverse swing during the late 1970s, and he passed his knowledge on to Imran Khan.
Mechanics
There have been plenty of theories about why, but here’s the simplest explanation from former England bowling coach Troy Cooley: “Reverse swing is all to do with the deterioration of the ball and the seam position in flight. As the ball becomes rougher, it will take on a different characteristic as it deteriorates. So if you present the ball as an outswinger, the ball has deteriorated so much on the rough side that it takes on the characteristics of the shiny side. Which means a natural outswinger will become an inswinger and conversely, an inswinger into an outswinger.”
How does it work?
Considering the fact that reverse swing generally occurs after 40 overs, it is tailor-made for the older ball. However, some of the England bowlers were able to reverse-swing the ball within 20 overs during the 2005 Ashes; Brett Lee managed it in 30 overs at Adelaide. But how can they manage to do this so early in the innings?
One reason could be the ball. In England, Test balls are manufactured by Dukes, while in Australia and parts of the sub-continent the Kookaburra brand is usually used. Like footballs, each manufacturer’s cricket balls are different. Some have more pronounced seams while others deteriorate slower, all of which have an influence on how the ball will move in the air.
Another theory is how some players are able to rough the ball up faster than other teams. In England’s some years back, Steve Harmison and Andrew Flintoff both banged the ball hard into the pitch. Their fielders often threw the ball back to wicket-keeper Geraint Jones on the bounce from the outfield, all of which contribute to the deterioration of the ball. Regardless of all this, batsmen the world over know what to expect when the ball starts to get older.