Gallen is likely to begin the season in the Diamondbacks' rotation, Steve Gilbert of MLB.com reports.
It comes as no surprise that Gallen is likely to crack the rotation to begin the season after he posted a 2.81 ERA with a 10.8 K/9 across 80 innings in the majors in 2019. Free-agent acquisition Madison Bumgarner and Robbie Ray are locked into the top two spots for Arizona, but Gallen will only have to out-perform the likes of Merrill Kelly, Alex Young and Taylor Clarke in spring training to solidify his role.