So, I don't like the framework that spinner's use of having a "stock ball" and then "variations", because I think its overly simplistic and limits our thinking about the way different deliveries can be used.
Instead, I've decided to think about bowling in terms of three types of deliveries:
Primary delivery - this is simply the delivery that you bowl that is most likely to beat the bat, and hence the one you bowl most of the time. You might just have one primary delivery, or you might have two (or even more). James Anderson, for example, has two primary deliveries - his inswinger and his outswinger; both are highly effective in their own right and he mixes them up pretty much equally. If you have one delivery that is your best delivery, this should be your "stock ball". If its not, why on earth not?
Secondary delivery - this is a delivery that could be as good as a primary delivery, but you're simply not as good at bowling it, perhaps it doesn't turn as much or your accuracy is not quite right. For a lot of legspinner's, a googly would fall into this category. Perhaps practice will make perfect, or perhaps you will have to simply use this delivery sparingly.
Surprise delivery - this is a delivery whose effectiveness relies it being a surprise. A quicker straight ball can make an effective surprise variation for example, but if you keep bowling it, it loses its effectiveness, because its not as dangerous a delivery in its own right as a well bowled leg break. Shane Warne's slider would be a good example.
Primary deliveries can be mixed up in a 50:50 ratio, surprise deliveries should be bowled only once every couple of overs else they lose their effectiveness. Secondary deliveries can be used either as a surprise delivery or almost as another primary delivery depending on how well they're coming out that day.
Instead, I've decided to think about bowling in terms of three types of deliveries:
Primary delivery - this is simply the delivery that you bowl that is most likely to beat the bat, and hence the one you bowl most of the time. You might just have one primary delivery, or you might have two (or even more). James Anderson, for example, has two primary deliveries - his inswinger and his outswinger; both are highly effective in their own right and he mixes them up pretty much equally. If you have one delivery that is your best delivery, this should be your "stock ball". If its not, why on earth not?
Secondary delivery - this is a delivery that could be as good as a primary delivery, but you're simply not as good at bowling it, perhaps it doesn't turn as much or your accuracy is not quite right. For a lot of legspinner's, a googly would fall into this category. Perhaps practice will make perfect, or perhaps you will have to simply use this delivery sparingly.
Surprise delivery - this is a delivery whose effectiveness relies it being a surprise. A quicker straight ball can make an effective surprise variation for example, but if you keep bowling it, it loses its effectiveness, because its not as dangerous a delivery in its own right as a well bowled leg break. Shane Warne's slider would be a good example.
Primary deliveries can be mixed up in a 50:50 ratio, surprise deliveries should be bowled only once every couple of overs else they lose their effectiveness. Secondary deliveries can be used either as a surprise delivery or almost as another primary delivery depending on how well they're coming out that day.