Cubs Quick Hits: Justin Grimm Said Goodbye to His Slider

Justin Grimm impressed Cubs fans with a stellar 1.99 ERA in 2015, only to follow it up with a 4.10 ERA and a brief AAA stint in 2016. Pinpointing the source of Grimm’s struggles is challenging, but we know that he altered his pitch strategy, foregoing four-seamers for more curves and completely erasing his slider.