Each finger should touch the corresponding seams on the inside and on the top. A two-seam fastball is a pitch in baseball and softball. The pitch has the speed of a fastball and can also include late-breaking action caused by varying the pressure of the index and middle fingers on the ball. To grip a four-seam fastball, you should place your index and middle fingertips on the perpendicular seam of the ball. The horseshoe seam of the ball should be facing the ring finger of your hand while your thumb is directly underneath the baseball, resting on the smooth leather instead of a seam.
To grip the knuckleball, position the ball in the same way as you would in the two-seam fastball or the splitter. Now, instead of laying your fingers along the seam of the ball, dig your fingertips into the leather. To grip a four-seam fastball, place your index and middle fingertips across the perpendicular seams of the baseball.
I prefer teaching a standard rotation curve because it allows for faster rotation and therefore the chance for a sharper break. But, more importantly, it’s YOUR responsibility as a coach to teach your kids the proper mechanics of the pitch, hitting streak pitching machine and provide them with exercises to condition the elbow and shoulder. Work for full arm extension to the plate on the follow through, just like on the fastball. Check out this change up from Max Scherzer to strike out Adam Dunn…
The four-seam fastball is perhaps the most common pitch and the first baseball pitching grip that beginners learn. This pitching grip is fast but also gives the pitchers greater control on where they place the pitch. The splitter looks like a two-seam fastball but drops right at the last second. The splitter baseball pitching grip looks very much like a two-seam fastball pitching grip, except your middle and index fingers are placed outside the seams as seen in the picture above. The two-seam fastball is about 1 to 3 MPH slower than the fastball, and it sinks to some degree (though it’s not a breaking pitch).
Moreover, when thrown correctly, a curveball can appear to be outside the strike zone, but then suddenly break back in towards the plate so that it’s a strike. When holding the baseball, don’t smother the ball close to your palm. Hold it more by the fingertips so that the ball is as much as an inch away from the palm. This ensures that there’s the least amount of friction between your hand and the ball.