Arizona Diamondbacks right-handed pitcher Merrill Kelly is facing uncertainty after undergoing a CT scan this week due to a persistent back injury that has kept him out of crucial spring training sessions. The 37-year-old was initially expected to get quick MRI results, but additional testing has delayed a clear diagnosis, leaving his readiness for the season in question.
Details Surrounding Kelly’s Injury and Medical Evaluation
Kelly first reported tightness in his back on Saturday, which caused him to miss a live batting practice. What was supposed to be a routine check-up has turned into a more comprehensive medical review as the team works to identify the exact condition. Arizona Diamondbacks manager Torey Lovullo acknowledged the complexity of the situation and emphasized the team’s cautious approach.
“We’re being very thorough with what we’re doing,” Lovullo explained to reporters. “We’re taking every test necessary to make sure that we get everything in the bag before we start to pass that information along. We’ve got to figure out exactly what’s happening in there.” – Torey Lovullo, Manager
Impact on Opening Day and Pitching Rotation
Kelly’s injury comes at a difficult time for Arizona, as he had recently been named the team’s Opening Day starter for the first time in his career. This appointment broke the five-year streak held by Zac Gallen, who had struggled through a tough 2025 season. Kelly was expected to lead a rotation featuring himself, Gallen, and Ryne Nelson as the top three starters, with Eduardo Rodríguez, Brandon Pfaadt, and Michael Soroka competing for the other two spots.
Should Kelly require placement on the injured list, Arizona’s rotation depth would face serious challenges. The team’s 40-man roster includes young pitchers such as Yilber Díaz, Cristian Mena, Kohl Drake, Mitch Bratt, and Dylan Ray, but none of these players has amassed more than 32 major league innings, raising questions about their immediate readiness to fill the gap.
The Role of a Seasoned Pitcher in Arizona’s Plans
Merrill Kelly’s significance to the Diamondbacks goes beyond his Opening Day role. Known for his consistency, Kelly has secured double-digit wins in three of the last four seasons. His pitching style, which relies heavily on his changeup complemented by five other pitches, allows him to be effective despite not having high velocity on the mound.
Comparatively, Kelly has maintained a better ERA since 2021 than several notable pitchers, including Dylan Cease and Zac Gallen, positioning him 19th in innings pitched despite missing considerable time in 2024 due to shoulder issues. His ability to limit walks has been a strength, balancing out occasional difficulties with home runs allowed.
After a brief period with the Texas Rangers following a midseason trade, Kelly returned to Arizona in the offseason. His deep familiarity with the organization and consistent past performances made him an important asset for Arizona as they strive to improve on recent successes.
Arizona’s Patient Approach Amid Uncertainty
The Diamondbacks are prioritizing Kelly’s long-term health over rushing him back onto the mound. With Opening Day still weeks away, the organization is using the additional time to thoroughly assess his condition. Nevertheless, the ongoing delay adds pressure to an already fragile rotation.
The baseball world is watching closely as Arizona navigates this early-season setback, hopeful that Merrill Kelly can recover fully from his back injury and fulfill his much-anticipated role as the team’s Opening Day starter.
