D-backs righty Merrill Kelly has been slowed by back discomfort in recent days and has undergone multiple waves of testing to get to the root of the issue. It seems the Snakes still haven’t determined the exact problem, but Kelly tells the team’s beat that he’s not expecting to be ready to take the mound on Opening Day (link via Nick Piecoro of the Arizona Republic). Tests thus far have fortunately not revealed any major issues in his back, but doctors are still working to ascertain what’s hobbling him. Piecoro adds that Kelly played catch today but still felt pain in his back while doing so.
If the D-backs feel Kelly only needs to be pushed back a few days or skip one start, it’s possible he could avoid a trip to the 15-day IL, but obviously today’s comments firmly put an IL stint on the table as a possibility. If he heads to the injured list to begin the season, Arizona will open the year with Zac Gallen, Ryne Nelson, Eduardo Rodriguez, Brandon Pfaadt and Michael Soroka in the rotation. One would imagine Gallen’s standing with the team would make him the Opening Day favorite, even on the heels of a down season, though that much will be determined as camp plays out.
Kelly, 37, spent six and a half seasons in the Diamondbacks’ rotation from 2019-25 but was traded to the Rangers at last summer’s deadline. Asked about his time with the D-backs following that trade, Kelly said he’d be open to a return in free agency after calling Phoenix home for so long and setting down some roots there. Though he didn’t perform as well as hoped in his two months with Texas, he still finished out the season with a sharp 3.52 ERA in 184 innings, fanning a roughly average 22.3% of his opponents against a strong 6.4% walk rate.
The Diamondbacks entered the offseason looking to scale back payroll but still managed to find common ground with Kelly, making a two-year offer worth $40MM that sold the righty on heading back to the desert. The D-backs are effectively trotting out the same rotation that struggled last year — plus an affordable one-year flier on the talented but injury-prone Soroka — so they’ll be counting on Pfaadt, Rodriguez and especially Gallen (who als0 re-signed as a free agent) to bounce back after rough showings.
It’s clearly not ideal for the team’s steadiest starter to already be dealing with an injury in camp — even if it proves minor — though the Snakes should have better rotation depth this year. Part of that is due to the very trade that shipped Kelly out of town. The Rangers sent pitching prospects Kohl Drake, Mitch Bratt and David Hagaman to Arizona to rent Kelly for the remainder of the ’25 season. Drake and Bratt are now both on the team’s 40-man roster and could make their big league debuts this season as they look to stake their claim to a long-term rotation spot.
Other depth options in camp include prospects Yilber Diaz and Cristian Mena, both of whom have made brief MLB debuts but struggled through down showings in 2025. Righty Dylan Ray was also selected to the 40-man roster this past offseason, and veterans Joe Ross and Thomas Hatch are in camp as non-roster invitees as well.
