By holding different directions while throwing, you perform different pitches, like a curveball or fastball.
An affinity for baseball and a fastball that was clocked at 93 miles per hour got Moore drafted by both the Boston Red Sox and the Baltimore Orioles, but his mother convinced him to go to college before embarking on a sports career.
To understand this, you have only to imagine a baseball pitcher trying to throw a fastball with his legs shackled.
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