Grimm’s fastball averaged 93.2 mph and topped out at 95.3 mph. It had an unimpressive 10% whiff rate (4.8% swinging-K rate) and allowed a .384 wOBA and .259 batting average across a 143-pitch sample.
His curveball was his second-most thrown pitch in 2018 at 41.8%. It had slightly above-average horizontal movement at 12 inches away from a right-hander (league-average horizontal movement was 10 inches) and exactly league-average drop at 54 inches. It had a 23.6% whiff rate, 33.3% chase rate and a 48.4% zone rate across a 123-pitch sample.
Grimm only threw 17.1 innings in 2018. His slider, which he threw only 7.5% of the time, was his best swing-and-miss pitch with a 45.5% whiff rate. It had a 35.7% chase rate, 39.1% zone rate and 21.7% swinging-strike rate across a small 22-pitch sample.