Tracking flyballs/linedrives isn't all that athletic of an activity. It's largely instinctual after years of following balls coming off bats from that distance/angle. Well, then spend some money to make an app where players can "see" thousands of fly balls coming off a bat (based off real plays in games) one after the other and watch it on their IPad from different positions on the field... the player has to decide quickly which way to break. You could even use the accelerometer/GPS and camera to do an agumented reality thing. You could even have it support different wind conditions at the different parks, etc, so you could see how a ball reacts with the wind blowing in or out. It's not going to be as good as real practice reps, but I have to believe something like that would accelerate the learning process. All kidding aside, this is the sort of thing you do in the offseason, not the middle of a season. You'd have to give LaHair all of next winter/spring to try and learn the position. The all star break wouldn't be enough time, especially since he will be playing in that game.