Throwing the ball in quickly and accurately from the outfield is an important skill for every fielder to master.
Having collected the ball in both hands, stand sideways to the target. The throwing arm is taken back behind the head.
Pull the non-throwing arm through. Throwing arm swings forward keeping the elbow at least level with top of throwing shoulder.
The wrist should be outside the line of, and behind, the elbow.
Release the ball with both feet on the ground and the chest facing the target.
Swing the throwing arm through so that both arms end up behind the opposite hip. Keep the head and eyes facing the target.