Green has been working on adding a curveball to his arsenal, James Wagner of The New York Times reports.
Green relied almost exclusively on fastballs and sliders last season -- per Statcast, he tossed one of those two pitches 98 percent of the time -- but he has already broken out his new curveball in spring training, according to Wagner. A curve could serve as a devastating contrast to Green's mid-to-upper-90s fastball and help improve upon his elite 33.1 percent strikeout rate.