Not only short term numbers, but there is a lot of batter vs pitcher in the Tigers mix. I suppose you could look at a guy's week to week or month to month (whatever you pick) OPS variance over a year get some idea of how consistent he is. If he's a really solid same every day guy, you maybe don't change your expectation over any short stretch. Maybe another guys is more streaky (Candelario?) and you want to move hin up when it looks like he going on a tear. Right now the Tigers have a lot of guys with short track records, so you don't have the depth of data, and even if you do, when you start slicing and dicing to finer sets of conditions sample sizes get down to where they lose significance. So even if you call yourself %100 quantitative, you are still make meta level judgements about how to use your data.