Hi there. I play first base for my high school team and am having a problem with my coach regarding the way I am holding runners on. Here is the situation. With a runner in first base and a lefty pitcher, I play pretty much behind the runner. When my pitcher (the move of whom I can see before the runner) makes his initial start of his stretch, I sneak in behind the runner and receive the ball from the pitcher on a pickoff throw. My coach says this is illegal in that it is throwing to an unoccupied base and I am deceiving the runner. So I need your help, is if legal what I am doing because I have had great success with it. If possible, please cite some rules from the Official a Rule Book in your response. Thanks!