Yeah, I'll trade the singles all day in order to take away some extra-base hits over his head. It seems really counterproductive to play that shallow in order to stop some balls from falling in front of you. It also seems like playing shallow would shrink his range down artificially, because balls hit deep or going to tend to hang in the air longer. So the extra balls he could get to by playing shallow aren't going to hang in the air as long. Which means, he has less time to cover ground. And that means his probable catch zone radius is going to be smaller. I wonder if we have any data to back this notion up. Statcast is going to be a great tool to help with defensive positioning. You can plot how often a ball is hit to every spot on the field and how long the ball hangs in the air, and then come up with the optimal spot to stick a guy, based on a catch probability zone. It's also much, much easier to get to balls in front of you than balls over your head, playing dudes shallow seems to make little sense to me, but I await more learned gentlemen with more evidence to show how wrong I am. I actually found that not to be true. I'll admit that this is all anecdotal and playing CF in Iowa HS ain't exactly the NLC. But other than balls directly behind me, I found going back easier. I think it's that on a ball hit deep, it's a dead sprint until you get there. You either get there or the ball hits the fence. On shallow hits, there's a point at which you need to decide if you're going for it or pulling up and that hesitation felt like it cost me some range. And on almost every short ball, except gappers, you have to play conservative as a ball getting by you is a disaster. I don't know how to possibly measure that and I'll admit I could be totally wrong. But that was definitely my experience in about 100 games in high school OF.