By Joe Lemire
September 18, 2013
Chris Tillman's changeup grip, seen here, has helped turn him into an All-Star.
Gail Burton/AP
Justin Verlander is known for his fastball but his changeup can be just as important to him.
Paul Sancya/AP

For now, the changeup is more finishing piece than fundamental, but its impact is undeniable, any way you spin it.

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