This from Fangraph's Nov 4 notes
Here is the SCOUT batting leaderboard for the Arizona Fall League (AFL). SCOUT represents an attempt to derive something meaningful from small samples and is the average of a player’s standard deviations from the AFL mean in three important (and regressed) stats: walk rate, strikeout rate, and home-run rate....
• Newest to the top-10 AFL batting leaderboard is Cincinnati middle-infield prospect Brodie Greene. Greene, 24, has made his way up the charts predominantly by virtue of his strikeout prevention. Greene made the bulk of his appearances in 2011 in the the High-A California League — a league for which he skewed old
See this link for the leaderboard and the article, but Greene is 9th by this metric.
There is a link insde the article about the metric which predicted that Kris Negron's 2010 AFL was probably over rated (and looks to be correct at this point). BTW, Brad Boxberger is rated at the top of the pitching board for this metric.