Is Zack Greinke Always Safe to Start?
I had some trouble figuring out whether to start Zack Greinke in my Ottoneu league tonight. By the merits of his fantasy stats, it should be an easy call. Greinke is the 10th-ranked starting pitcher in the format, and while his strikeout rate (24.4 percent) is merely decent, he racks up enough innings to compensate for that. With a .309 team wOBA against righties, the Nationals don’t rank as a particularly fearsome matchup, but with Greinke qualifying as a fantasy ace, the Diamondbacks’ opponent probably doesn’t factor into many owners’ decisions.
Yet in a game where the frequency of swinging strikes is critical to a player’s value — whether it’s a pitcher or hitter — it’s hard to ignore Greinke’s downward-trending SwStr%. It fell from 12.4 percent in 2017 to 10.8 percent in 2018, and while he has rebounded from similar drops before, this year it stands at just 9.3 percent. Digging a little deeper, the increase in contact is happening mostly on his pitches outside of the strike zone. Greinke’s 84.7 percent Z-Contact% is 1.3 percentage points above last season’s mark and o.1 percentage point below the major league median. While that’s not especially encouraging, it’s Greinke’s 73.7 percent O-Contact% that is truly concerning. It’s far worse than the median O-Contact% of 62.2 percent and six points higher than his rate from 2018.
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