I don't care Pitchf/x, this is definitely a Slider and not a Curveball. Essentially, the pitch either featured well below average horizontal and vertical movement or was exception in both departments as a Slider, coming in at 83.5mph. Anyway, Duffy's premier putaway pitch was all kinds of nasty, earning a 41.1% K rate as he boosted its velocity about three ticks, jumping from a 9.8% whiff rate a great 15.9% in 2016. The O-Swing followed with a near 12 point boost to 37.7% and the Ks were abundant. It's hard not to love watching it debilitate batters left and right.