That’s easy. As many as it takes to keep hitters fooled. For Mariano Rivera it takes only one. For most others, it takes three.
The question you must ask yourself is how many pitches can you throw for a strike (or to the location of your choosing) 60% of the time?
If the answer is zero, you need to work on your mechanics.
If the answer is one. Fastball. You’ll not be fooling many hitters after the age of 12.
It’s time to learn some new pitches this fall.
