This article's target audience is people in the public sphere who research and write about baseball. The guiding question is this: "why do Sabermetricians rarely talk about player development?" Russell Carleton rightly points out that player development analysis tends to be focused only on what players do post-development, which really misses the mark. Carleton then suggests a few items today's analysts need to consider before delving into the the nitty gritty of player development.
Namely, there is a relative lack of information about players in development; there's inconvenient fact that each player is different and has different strengths, weaknesses, and needs; and then we have the misleading nature of minor league box scores.