Why? They take his first start and most recent start without any attention to the other two(since it's only two starts it's not like it's a ton of legwork). Harden's repertoire is such that both the data collected and the way they present it is misleading. Harden throws essentially the same pitch at varying speeds. Considering His first start was against the Brewers, a team with several disciplined hitters, it's not surprising for him to throw comparatively more "off speed" stuff against the Marlins, a team whose best hitters are younger and more free swingers. Furthermore, the lumping together of percentages of pitches at a certain velocity, especially bands as tight as a few mph, is misleading. It would not take very many pitches to influence those percentages in a large way, whether they were intentionally thrown with less on them, Milwaukee's Pitch f/x gun is slightly different than Chicago's, or if he were actually hiding an injury. It's a lazily thrown together piece, like someone went looking for data to support a conclusion.