Why do you pull the bowling ball to the left?

Answer 1

It depends on if you're right handed or left. If right handed, it could be that your hand is rotating clockwise as you are delivering the ball, which is called a backup ball. As you are delivering the ball, try to only slightly turn the hand counter-clockwise or keep it in a position where as you release the ball, your thumb comes up between the 10-12 oclock position and fingers at the 4-6 position.

Answer 2

For a right handed bowler, you pull the ball left when you do not complete your follow through. Try finishing with your right hand high and pointing right.