 Nathan throws a mix of four pitches . His main pitch , a four @-@ seam fastball was once thrown in the mid @-@ to @-@ upper 90s , but now settles between 91 and 94 mph . His main breaking ball is a hard slider in the upper 80s , occasionally even touching 90 . He uses the slider less frequently against left @-@ handed hitters , preferring to use a curveball in the low 80s . He also uses a two @-@ seam fastball against <unk> . His slider is his best swing @-@ and @-@ miss pitch , with a <unk> rate of 42 % since 2007 . 
