Cole Ragans

Zombro has become well-regarded in the baseball industry for his work as a pitching coach at Tread Athletics where pitchers like Cole Ragans have started to develop their arsenals in the offseason. This is a similar move to when the Red Sox hired Driveline's Kyle Boddy in the offseason last year. According to Passan, Zombro will "work in all areas of Chicago's organization to help improve the performance of the Cubs' arms." While it's unclear now just how this might change the outlook for Cubs' pitchers, keep in mind that the Red Sox as an organization drastically changed their philosophy with regard to fastball usage last season, so there may be wholesale modifications coming here in Chicago.