Diamondbacks pitcher Zac Gallen off to solid start in 2020 Posted Aug 3, 2020 Former UNC pitcher Zac Gallen has made two starts this season for the Arizona Diamondbacks, and has allowed just three runs over ten innings. Although he does not have a decision to his name, the Diamondbacks won both of his starts. Gallen was drafted by St. Louis in the third round of the 2016 MLB Draft and quickly rose through the ranks. (Keeping It Heel)