Echoing my thoughts in the other thread, a BABIP rating (as opposed to "poise") wouldn't be a bad idea, however keeping this rating "hidden" would make sense, given that this is something about a pitcher that is often only known retrospectively. See excerpt from my post in that thread below:
"We know now that many pitchers have the distinct ability to prevent hits on balls in play over the course of a career (see Tom Tippett's excellent article on this at
http://www.diamond-mind.com/articles/ipavg2.htm), however this is something that is often known only retrospectively about a pitcher, after he's pitched several seasons. For this reason, keeping this rating "hidden" makes sense."