Gallen will start Opening Day versus the Dodgers on Thursday, Evan Woodbery of MLive.com reports.
Gallen will toe the rubber at Chase Field as the Diamondbacks launch their season next week. The right-hander has evolved into Arizona's ace, producing a 2.54 ERA and microscopic 0.91 WHIP with 192 strikeouts over 184 innings in 31 starts with the team in 2022. If Gallen can take another step up in 2023, he'll elevate himself into the Cy Young conversation in the National League.