Kids give you an excuse to work on your fastball .

孩子们给你一个练习快球的理由。

But his regular four-seam fastball is legit , too .

不过他常投的四缝线快速球也够正统。

Fastball slowing , kids rushing , and the baseball world passing him by ?

快速球变慢了，后浪推前浪，棒球世界就要离他而去？

He would want a slider and I would throw a fastball .

他可能要我投滑球,我却投了一个快速球。

At times his fastball will show some cutting action into right-handed hitters .

有时候他的快速球表现出一些切行。