So far this season, Felix Hernandez has thrown a total of 1009 pitches. Every one of these (even the super rare hanging changeup) has been a gift from the baseball gods and should be cherished accordingly. Remember to appreciate your King! Of those ~1000 pitches, PITCHf/x informs me that 197 have been curveballs. That may not necessarily sound like too many, but it's actually the largest percentage of curves that Felix has thrown since PITCHf/x started keeping track of such things.
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Every season since 2012, Felix has steadily employed his curve more and more frequently.