At the major collegiate level and higher, two-seam fastballs are typically thrown in the low 90s (MPH), but with much variation. The velocity of this pitch will also vary greatly from pitcher to pitcher. On the other hand, power pitchers such as Justin Verlander combine control, high velocity, and break to make the two-seamer one of the most effective pitches in baseball. Many pitchers, especially those without exceptional velocity, prefer a two-seam fastball to the four-seam because of its movement at the plate. Its use is widespread throughout all levels of baseball, and most pitchers at any level have a two-seamer in their repertoire. The two-seamer is a very natural pitch to throw, and is often taught to pitchers at a very early age. The amount of break on the pitch will vary greatly from pitcher to pitcher depending on velocity, arm slot angle and pressure points of the fingers. The two-seam fastball is designed to have more movement than a four-seam fastball, but can be more difficult to master and control. The two seam fastball will often have one or two miles per hour less speed than the four-seam fastball, but the slight pronation of the hand and off-center spin on the ball will carry the ball down and toward the pitcher’s dominant side, down and to the right for right-handers, and down and to the left for left-handers. Both techniques cause the ball to spin out of the hand off-center and away from the pitcher, similar to the spin of a changeup. Typically, the two-seam will have more movement if the pitcher applies index finger tip pressure, or holds the baseball deeper in the hand. The arm action is identical to a four-seam fastball, although the hand action differs slightly. There are several different ways to grip a two-seam fastball, the most common of which is to place the index and middle fingers along the seams where the two seams are closest together (where the horseshoes point in towards each other) with the thumb placed directly below on the leather with the rear of the thumb just touching the bottom near seam.
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