A.J. Burnett is behind only Yu Darvish in strikeouts this year. (Photo Credit: David Hague)

We took a look on Monday at five Pirates hitters and which stats have a large enough 2013 sample size for us to see year-to-year changes.

Now it's time for the pitchers. Remember a couple important caveats. First, batting statistics tend to be more reliable than pitching statistics, especially in small samples. Second, early-season pitcher performance can often be skewed by which teams the pitcher has faced. I've talked about the importance of strength of schedule in evaluating a team in April, and that idea is even more important when we are discussing a pitcher that has made seven starts at most.

For example, Washington's Jordan Zimmermann has faced one of the weakest offensive schedules ...

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