Can the pitcher be on the mound without the ball?

Can the pitcher be on the mound without the ball? In professional baseball, under Rule 6.02(a)(9), a balk occurs if the pitcher is standing on or astride of the pitching rubber without the ball. As play after a foul ball, hit batsman, or time out, must not resume until the pitcher is on the pitcher’s mound, the infielder cannot use these times to obtain the ball.

In professional baseball, under Rule 6.02(a)(9), a balk occurs if the pitcher is standing on or astride of the pitching rubber without the ball. As play after a foul ball, hit batsman, or time out, must not resume until the pitcher is on the pitcher’s mound, the infielder cannot use these times to obtain the ball.