Merrill Kelly named 2026 MLB Opening Day starter for Arizona Diamondbacks

PHOENIX β When the 2026 MLB season kicks off, the Arizona Diamondbacks will be handing the ball to Merrill Kelly on Opening Day, as Kelly has been named the starting pitcher per MLB writer Steve Gilbert.

Arizona Diamondbacks pitcher Merrill Kelly during spring training workouts at Salt River Fields on Feb. 13, 2026, Scottsdale. Β© Rob Schumacher/The Republic / USA TODAY NETWORK via Imagn Images
Merrill Kelly gets the Opening Day nod for the D-backs:
With Corbin Burnes sidelined following Tommy John surgery and unable to be available before Opening Day, Arizona needed certainty. While Zac Gallen remains talented, 2024 revealed struggles and stretches where his command wavered at the worst moments. Kelly, meanwhile, was surgical. Kelly was traded midseason to the Texas Rangers, and in 2025, he carried a 3.52 ERA with a 12-9 record. His splitter generated strikeouts against some of the best hitters in the league. This wasnβt smoke and mirrors. It was a repeatable command layered over veteran sequencing.

Sep 20, 2025; Phoenix, Arizona, USA; Arizona Diamondbacks pitcher Zac Gallen (23) pitches against the Philadelphia Phillies during the third inning at Chase Field. Mandatory Credit: Joe Camporeale-Imagn Images
Fans in Phoenix wanted both arms back. They got them. But the Opening Day nod tells you what the organization sees right now: Kellyβs stuff is sharper. His floor is higher. His emotional steadiness sets the tone in a division that punishes hesitation. Thereβs psychological gravity to this decision. Gallen now pitches from a prove-it posture on a one-year deal. Burnes, when healthy, adds October-level upside. But Kelly will be the No. 1 pitcher in the rotation when the season begins.

Arizona Diamondbacks pitcher Corbin Burnes (back) and pitching coach Brian Kaplan watch pitcher Merrill Kelly (29) throw during spring training workouts on Feb. 10, 2026, at Salt River Fields in Scottsdale. Β© Rob Schumacher/The Republic / USA TODAY NETWORK via Imagn Images
For a club balancing long-term payroll planning with immediate NL West contention, this is the right risk allocation. Kelly gives Arizona competitive oxygen while others recalibrate. Opening Day isnβt about just reputation; itβs about reliability, and Kelly gives the Diamondbacks both.