Fielding a Slow Roller (Glove)

Step 1: Stance

Both arms are out in front, knees slightly bent, and feet are slowly moving towards home plate at shoulder width apart.

Shoulder Girdle - both are slightly abducted
Shoulder Joint - slightly adducted
Elbow and Radioulnar Joints - Flexed about 40 degrees and supinated
Wrist and Hand Joints - fingers and thumb extended and slightly abducted

Muscles involved: pectoralis minor, serratus anterior, latissimus dorsi, teres major, biceps brachii, brachialis, brachioradialis, extensors , abductor policis longus

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Step 2: Prep
While running in to get slow rolling ball (in an arch), put glove hand out all the way down to the ground to field the ball. The objective is to field the ball on your left foot.

Shoulder Girdle - (throwing arm) adducted (non-throwing arm) abducted
Shoulder Joint - (throwing arm) extended (non-throwing arm) extended and slightly slightly adducted
Elbow and Radioulnar Joints - (throwing arm) extended (non-throwing arm) extended and supinated
Wrist and Hand Joints - (non-throwing arm) wrist extended and fingers abducted 

Muscles involved: trapezius, pectoralis major, biceps brachii, triceps brachii, supinator, and extensors

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Step 3: Movement

If fielded properly on left foot, momentum will now take you to the target. Continue moving toward target as you reach back to throw the ball. While doing this, point the glove towards the target to increase accuracy.

Shoulder Girdle - (throwing arm) adducted (non-throwing arm) abducted
Shoulder Joint - (throwing arm) abduction (non-throwing arm) horizontal abduction
Elbow and Radioulnar Joints - extended
Wrist and Hand Joints - (throwing arm) thumb ,2nd, and 3rd finger extended, 4th and 5th finger flexed (non-throwing arm) fingers adducted)

Muscles involved: trapezius, serratus anterior, brachalis, biceps brachii, brachioradialis, palmaris longus, flexors

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Step 4: Follow through

Throw the ball over the top since the angle at which you fielded the ball will allow for a regular throw. Throwing off the back foot will generate the most power in this situation.

Shoulder Girdle - (throwing arm) adducted/upward rotation (non-throwing arm) abduction
Shoulder Joint - (throwing arm) diagonal abduction (non-throwing arm) internal rotation
Elbow and Radioulnar Joints - (throwing arm) extended (non-throwing arm) flexed
Wrist and Hand Joints - (throwing arm) wrist, thumb, 2nd and 3rd finger extended, 4th and 5th finger flexed (non-throwing arm) wrist flexed, fingers extended and adducted.

Muscles involved: serratus anterior, latissumus dorsi, teres major, subscapularis, pectoralis major, biceps brachii, bracioradialis, brachialis, triceps palmaris longus, flexors, extensors

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Step 5: Recovery

After the throw, your momentum should be taking you right at the target as if you were "following your throw". Slowly come to a stop.

Shoulder Girdle - depressed
Shoulder Joint - (throwing arm) diagonal adduction (non-throwing arm) internal rotation
Elbow and Radioulnar Joints - (throwing arm) extended (non-throwing arm) flexed
Wrist and Hand Joints - (throwing arm) fingers adducted (non-throwing arm) fingers adducted and wrist flexed

Muscles involved: trapezius, rhomboids,pectoralis major, subscapularis, triceps brachii, biceps brachi, brachioradialis, brachialis,palmaris longus, flexors, extensors

Drill: A good drill for fielding a slow roller with the glove is to use a cone, and a stationary ball. The only time a player would field a slow roller with a glove is because there is ample time to get the ball from the glove, to the throwing hand, and still get the runner out. With this, throwing on the run takes away a lot of the momentum one would normally have on the throw because they can no longer use all of their legs and hips as they did in a regular throw. So, to get more momentum, the player wants to take an arch like route to the ball so that when they are fielding the ball, they are running directly towards first base. Placing a stationary ball in the grass, and a cone in between the player and stationary ball will force the player to run around the cone with their momentum going towards first. After the player goes around the cone, they come back up and make the on the run throw. An illustration of the drill is below.