Why do they call a high fastball the high cheese?

Why do they call a high fastball the high cheese? It’s called cheese because cheese is easy to slice through. Cheese is a fastball that is easy to hit. Cheese is a fastball that is easy to hit.

It’s called cheese because cheese is easy to slice through. Cheese is a fastball that is easy to hit. Cheese is a fastball that is easy to hit.
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