Last time, we looked at cumulative run differentials as a way of evaluating an organization’s farm system. We’re going to revisit that idea, but this time we’ll attempt to adjust for age. Organizations, natch, have different drafting strategies and promotion philosophies, which leads to some age variance from level to level. Age relative to peer group is a vital analytical component when scrutinizing individual prospects, and it should also be a factor on the systemic level. And so it shall be.
Another change this time around is that I’ve narrowed the focus to each organization’s full-season affiliates (Triple-A, Double-A, High-A and Low-A). I made this decision because you see quite a bit of variation in how teams flesh out the lower rungs of their systems. For instance, in 2003 nine teams opted to field multiple rookie-level teams and no short-season affiliate at all. This makes system-wide comparisons at the lower levels a bit nettlesome and misleading. I’d also suggest that it’s appropriate to place the emphasis on those levels closest to the major leagues.