Mattionals - Span saw 3.89 pitches per plate appearance last year, while this year he's seeing 3.90. Last year he was .283 / .342 / .395. I don't think the extra .01 pitches per plate appearance is the key to the .019 / .023 / .036 drop in his BA / OBP / SLG. On the other hand, it probably is not just BABIP, either, as that has only dropped .009. Strikeout % is slightly up (10.9% to 12.6%) and BB% is down (8.3% to 7.1%), so it isn't so much taking more pitches as perhaps losing a bit of his strike zone judgment.