ESPN has an article out called The Problem with High School Catcher. If you can't tell by the name it is about drafting HS catchers. The article mentions that: Of the 63 starting or backup catchers, roughly 20 percent were drafted out of the prep ranks at that position. You can count on your hands the amount that eventually made it out of the minors in the past decade. The article states the three main reason's for catchers to fail are physical concerns, mental rigor of catching, and uneven performance. One NL scout had this to say: "They get injured, they don’t develop, they don’t get stronger," an NL Central scout said. "You need a strong guy behind the plate, and a lot of those high school catchers need to get bigger and stronger. Some don’t. Their back can't take the stress that the position demands, and they end up being .200 hitters and maybe a backup in the big leagues." On Law's and Christopher Crawford's draft boards they had McGuire at 20 and 19.