by rule the pitcher can not be on or astride the rubber without the ball. he may be in the 18’ dirt circle. usually walking around the back of the mound with his back to the runner allows for a bold runner to begin his lead early because he does not feel threatened. The key for the third baseman is to have the runner see you well off the bag and not watching him. Once he shifts attention to the pitcher, F5 can then slowly slip behind the runner from outside his peripheral vision, then sprint in for the tag. Be sure to block the runner from returning to the base because the base umpire may be sleeping as well. By the time he swivels his head around, if the runner is in contact with the bag, you may get a blown call.