Diamondbacks' Merrill Kelly Nearing Return to Game Action

Veteran right-hander progressing well from mid-back tightness, could be back in rotation soon

Published on Mar. 8, 2026

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Arizona Diamondbacks pitcher Merrill Kelly continues to make positive strides in his recovery from a mid-back injury that had sidelined him earlier in spring training. Kelly threw a live batting practice session on Sunday and is expected to throw a bullpen soon, putting him on track to potentially return to Cactus League games in the near future.

Why it matters

Kelly is a key part of the Diamondbacks' starting rotation, so his timely return is crucial for the team as they prepare for the upcoming season. The Diamondbacks have yet to name their opening day starter, and Kelly's progress could put him in contention for that role if he can continue to avoid setbacks.

The details

Kelly was initially shut down from throwing due to mid-back tightness, which was later diagnosed as intercostal nerve irritation. He did not land on the Injured List, but fell behind the rest of the rotation in his spring training schedule. After throwing live batting practice on Sunday with no issues, Kelly is expected to throw a bullpen session soon and then potentially get into a Cactus League game, though the team is still determining his exact timeline.

  • Kelly threw a live batting practice session on Sunday, March 8, 2026.
  • Kelly is expected to throw a bullpen session in the coming days.

The players

Merrill Kelly

A veteran right-handed pitcher for the Arizona Diamondbacks.

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What they’re saying

“Provided he continues to feel good, [Kelly] thinks he will throw a bullpen and then get into a Cactus League game. All subject to change but trending positively.”

— Steve Gilbert, MLB.com reporter (X/Twitter)

What’s next

If Kelly continues to progress without setbacks, he could potentially return to the Diamondbacks' rotation in time for their home series against the Detroit Tigers.

The takeaway

Kelly's recovery from his mid-back injury is an encouraging sign for the Diamondbacks, who are counting on the veteran right-hander to be a key part of their starting rotation this season. His timely return could put him in contention for the opening day start, provided he can continue to work his way back without any further issues.