Plate discipline levels out quickly and is among the earliest predictive sample sizes. What have each of your Marlins starters done interestingly at the dish this season?
One of the first things to become "stable," or perhaps the better term is "predictive" over the course of a sample of baseball games is swing rate. Overall swing rate is about 50 percent predictive of true talent as of right now. That means that, if you look at any numbers in the month of April, with the season so young, and you want to ignore data from before this season (don't ask me why you would necessarily want to do that), you should be looking at plate discipline data, particularly swing rates.