As the minor league season progresses into its middle half, the amount of player movement in the A's system continues to increase. But as standouts at each level get promoted to the next, how can we try to understand whose dominance will carry over to higher-level challenges? I spend the first half of this week's show walking through my own prospect analysis journey—in general at first, but narrowing to this topic in particular—and then the second half applies my theoretical framework to eight specific recent promotees in the A's system, two at each of the four full-season levels.