What does four-seam fastball mean?

Here's a list of possible definitions for the term four-seam fastball:

Wiktionary

  1. four-seam fastball(Noun)

    A backspin pitch thrown with a ball gripped in the direction to cause four of the seams of the ball to cross the flight path and released with roughly equal pressure by the index and middle fingers

Numerology

  1. Chaldean Numerology

    The numerical value of four-seam fastball in Chaldean Numerology is: 7

  2. Pythagorean Numerology

    The numerical value of four-seam fastball in Pythagorean Numerology is: 9


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