The guys at BA rolled out the first league Top 20's today. The Arizona League was the first one. The Reds Gabriel Rosa came in at #15 and was the only Red among the top 20 prospects.
Just to clarify, this is the Arizona League, for rookies -- not the AFL for advanced prospects on the cusp.
With Rosa, the story is much the same as for most kids that age: has the tools, needs to work on his approach and the details.