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For the second phase of this shoulder prevention pitching drill one athlete will continue facing forward while the opposite athlete turns to face their partner. Athlete facing their partner will be performing the should prevention portion of this phase of the pitching drill while partner the facing forward will be focused on strengthening their core.
5. Release: Releasing a curveball is much different than releasing a fastball. A fastball release is straight out in front of your body. In effect, the way you release the ball is the type of action you want the pitch to have. When releasing a curveball, your wrist will be hooked and your hand will pull down in front of your body. It is important that you release the ball close to your body (Short Arm). The further you release from your body, the less resistance your middle finger will have on the seam and therefore your rotation will be looser. Loose rotation curveballs tend to spin or hang.
The athlete facing their partner will hold the KB Powerbands handle in one hand and raise their arm so their elbow is even with their shoulder and there is a 90 degree angle at the elbow. Athletes will move so there is tension on the resistance band and slowly rotate their hand forward, keeping the elbow and upper arm stationery. Athletes will perform a controlled motion for 4-5 seconds on the downward motion while maintaining a normal speed while returning to the starting position.
Both partners will begin in a standing position, facing forward so athletes are side to side, each with one end of the KB Powerbands. The athlete performing the shoulder prevention exercises will put their hand or a towel high in their armpit, bring their elbow to their side, and make a 90 degree angle at the elbow. Holding the KB Powerbands athletes will maintain this position with their arm and begin to rotate just the bottom portion of their arm (forearm and hand) away from their body. It is important athletes do not let their elbow move away from their body. Keeping the elbow tight will allow athletes to experience the full benefits of the pitching drill. Athletes will move the hand away from their body at a normal speed while taking 4-5 seconds to control the resistance as the hand moves back toward the body.
The spinning action created when the pitcher releases the ball is the secret behind the curveball. This spinning causes air to flow differently over the top of the ball than it does under the ball. The top of the ball is spinning directly into air and the bottom of the ball is spinning with the air flow. The air under the ball is flowing faster than air on top of the ball creating less pressure, which forces the ball to move down or curve. This imbalance of force is called the Magnus Effect, named for physicist Gustav Magnus, who discovered in 1852 that a spinning object traveling through liquid is forced to move sideways.
Let's begin. A pitcher will stand perpendicular to a straight line (like a foul line in the outfield grass or line on a gym floor). If the pitcher is on the pitching mound itself, he can use his spikes to drag out a straight line in the dirt 8-feet long and perpendicular to the rubber (i.e. directly in line with home plate). Then, he simply marks out the distance of his height and drags out a second line in the dirt--only this one is parallel to the pitcher's rubber. If the pitcher is not on a mound, he will simply place a second object like his hat on the ground. This will mark the distance he should be striding toward his target.
Grip the ball. The knuckle curveball is similar to other grips, but the variable this time will be your index finger. Grip the ball with your middle finger along the bottom seam, and your thumb along the back seam. Hold the baseball such that the curves of the seams are close to your palm, with one on top and one on the bottom of your palm. Bend your index finger inward before laying it on the ball so that your nail and top knuckle are resting on the ball and your middle knuckle is pointing at the target.

The most fundamental property of any pitch is its speed. In the graph below, the speed is shown on the vertical axis. Looking at pitches thrown by Zack Greinke of the Arizona Diamondbacks in a game against the Dodgers last year, we see that there are some leisurely ones (curveballs, denoted by pink symbols) and some electric ones (fastballs, marked by red and green symbols):


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Throwing a curveball in baseball is a fantastic way to dazzle your friends and baffle your opponents. Most of the technique of how to throw these curveballs is in the grip of the ball and the release. Although it takes a bit of practice, once you’ve put some time and commitment into it, you’ll be throwing steep curve-balls like the pros in no time!
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The difficulty with this pitch isn't from the pitch itself. In fact, most pitchers feel this grip gives them the most rotation – and most movement – of any breaking pitch. However, many pitchers who are learning this pitch for the first time, aren't comfortable with the "tucking" part. It's not super comfortable at first to tuck your index finger into the baseball.
Grip the outside of the ball along the long seam. Set your index and middle fingers along the inside of the right seam if you are right-handed, and along the inside of the left seam if you are left-handed. Place your thumb under the ball, opposite from your fingers, at a 45-degree angle. Make the ball roll off your index finger as you snap your wrist, creating a spin that takes the ball down and across the plate. Do not twist your elbow or wrist. "Most good slider pitchers grip the outer-third of the baseball and cock their wrist slightly, but not stiffly, to their throwing hand's thumb-side upon release of the pitch," pitching instructor Steven Ellis wrote on his website, The Complete Pitcher. "This enables a pitcher to apply pressure to the outer-half of the ball with the index finger."

Mostly the speed and amount of break. A curveball is thrown more slowly than a slider, and the amount of curve on its trajectory is more even. From the batter’s perspective it looks like the pitch is falling off a table. On the other hand, a slider is thrown almost as hard as a fastball. Its trajectory is much sharper than a curveball’s, its break becomes noticeable about 2/3 of the way towards the plate. To a batter it looks like a fastball, then suddenly breaks sharply.

6. Arm speed: It is extremely important that you maintain similar arm speed with your curveball that you have with your fastball. A hitter reads arm speed. The matter of arm speed is obviously more important with a changeup than it is with a curveball, but it’s important for other reasons. Another way to get a tight rotation and hard downward movement with a curveball is to throw it with quicker arm speed. If two pitchers have the exact same curveball grip, mechanics, release, etc. but one throws it with quicker arm speed, the one with quicker arm speed will throw the curveball with more break, and thus the harder pitch to hit.
Go through your regular wind-up routine, but stop when you get to the kick, holding at your balance point for three to five seconds. Have a friend, coach, or teammate make sure that your leg is waist-height or higher, or have a look in the mirror. If you have trouble holding the stance for five seconds, practice tightening up your abdominal muscles, bending the leg you're standing on and aligning the height of your hips and shoulders.

Step 2: This grip provides maximum rotation movement, more than any breaking pitch. However, many pitchers who are learning this pitch for the first time aren’t comfortable with the ‘tuck’.  It’s not natural at first to tuck your index finger into the baseball. I recommend, preferably during the off-season, to practice tucking your index finger into the baseball. Do it while you’re watching TV!
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What pitcher doesn't want to throw a powerful, record-breaking fastball? According to Dr. Bagonzi, a great pitch isn't just about genetic talent; it can be taught. By now we know that velocity begins in windup, followed through with a powerful throw. Good upper body baseball pitching drills improve velocity by increasing arm strength and speed. For that, the legendary pitcher recommends the following:
To perform tuck jumps athletes will jump as high as they can in the air, while airborne athletes will tuck their knees into their chest. These jumps should be performed consecutively jumping, landing and immediately jumping back into the air and tucking the knees. Athletes cannot allow the resistance to alter their body positioning and need to maintain good spacing between the knees so the knees, hips, and ankles are all aligned. Athletes will perform 8-12 resisted tuck jumps for 3-4 sets before removing the Kbands and performing 2-3 unresisted sets of 8-12 repetitions.
For all three variations of the preventative youth pitching drills athletes will perform 2-3 sets of 8-10 repetitions per arm. Athletes need to rotate through this pitching drill with their partners moving from the shoulder portion into the abdominal portion. Rotating positions will act as the rest period for the athletes which is why rotating after every set is important to keep athletes arms and abs fresh for the next set of pitching exercises. This pitching drill is a great way to get athletes shoulders and core warmed up before a game or training session and should be utilized before athletic activity is performed.
As you improve, you can make this drill harder by making it a bull’s-eye practice. Seated as you were at the same distance apart, take turns pitching to each other again, but this time, the catcher will sit with her glove in front of her face, protecting her head. The pitcher should aim for the glove, focusing on proper shoulder rotation and keeping her elbow above the shoulder.
Master the "two-seam" fastball. Once you effectively use the two-seam grip and arm motion, creating sinking action on the ball, you will be better prepared to throw sliders. For the two-seam fastball, place your index finger and your middle finger directly on the narrow seams of the ball -- the top of the "U" in the stitching. Put your thumb on the bottom of the ball, on the smooth surface of the ball directly under the fingers. Grip the ball tightly to create friction and movement. Use the same arm motion as on a regular or "four-seam" fastball.

Let's begin. A pitcher will stand perpendicular to a straight line (like a foul line in the outfield grass or line on a gym floor). If the pitcher is on the pitching mound itself, he can use his spikes to drag out a straight line in the dirt 8-feet long and perpendicular to the rubber (i.e. directly in line with home plate). Then, he simply marks out the distance of his height and drags out a second line in the dirt--only this one is parallel to the pitcher's rubber. If the pitcher is not on a mound, he will simply place a second object like his hat on the ground. This will mark the distance he should be striding toward his target.

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