It depends on what you do with it some. If the player is pulling with the head so that the head is not perpendicular to the shoulders it can lower the slot. It is often associated with opening the shoulders too early and dragging the arm through the slot. If the head remains perpendicular to the shoulders it doesn’t have much impact in my opinion. If you are trying to get to the next level, no pitching coach likes to see it. However, if you throw 95 mph and hit your spots it will probably work out for you.