Follow through phase of "snapping"

Follow through: while ball goes between legs leaving the ground, a turning of the wrist outwards (pronation) releasing the ball into the quarterbacks hands once ball is off the ground.

Shoulder Joint: partial internal rotation with latissimus dorsi, teres major, pectoralis major, and subscapularis muscles, concentric.

Shoulder Girdle: Abduction, serratus anterior and pectoralis minor muscles, concentric.

Elbow:

     Right: extended,with triceps brachii,  eccentric

     Left:flexed,with brachialis, concentric

Radioulnar joints: 

     Right: pronation, with pronator teres,concentric

     Left: pronation with pronator teres, concentric

Wrist and Hand:
     Right:  Flexion/Abduction of wrist, with flexor carpi radialis, concentric 
                Flexion of fingers, with flexor pollicis longus and flexor digitorum superificialis, concentric
     Left:   wrist and fingers are neutral