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In the Corner with Dan Hughes

Sep 22, 2011

Some authors claim that softballs carry farther in hot weather, but anyone who has played knows the opposite is true.  Why the confusion? 

It has to do with relative humidity and air density and ball compression.

Normal ASA ball compression is 375, which means that it requires a force of 375 pounds to push the surface of a softball one-fourth of an inch deep. 

Harder balls have higher compression numbers, because it takes more pounds of force to "squash" the ball a quarter-inch.  And the higher the compression, the better the trampoline effect when the ball hits the bat. 

Ergo, high compression = more distance.  And a 375 ball at 70 degrees becomes a 555 ball at 40 degrees. 

Listen up, it's all here.

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