can you put your hand under the ball in basketball
Most basketball players slide their hand to one side of the ball when dribbling to better control the ball, directing it from left to right and vice versa. So long as the ball does not come to rest this is perfectly legal. Moreover, dribbling this way allows more control and easier ball-handling. The problem arises when the ball-handler slides their hand too far down the side of the ball, having their hand below the ball. A carrying violation is called once the player's hand is below the ball's plane of 90° and the ball comes to rest significantly.
Carrying (basketball)