The Arizona Diamondbacks are likely to lose Michael Soroka and Zac Gallen in free agency, creating significant openings within their starting rotation.

Gallen struggled during the season and also dealt with inflammation in his right elbow. Those problems add further uncertainty to Arizona’s pitching plans entering 2027.

His possible departure could leave Corbin Burnes, Eduardo Rodríguez, Ryne Nelson, Merrill Kelly and Brandon Pfaadt as the Diamondbacks’ remaining rotation options.

Building depth will be just as important as determining which pitchers belong at the top of the staff. Arizona cannot reasonably expect the same five starters to remain effective and available throughout the entire season.

With that need in mind, right-hander Cal Quantrill represents an intriguing possibility for the Diamondbacks.

Quantrill could contribute as either a starter or reliever. He posted a 2.86 ERA and 1.04 WHIP in 110 innings over 32 appearances (15 starts) for the Texas Rangers in 2026.

His experience in both roles would provide flexibility whenever injuries, workload restrictions or ineffective performances require changes to the rotation.

However, Quantrill recorded a 3.85 xERA and 4.01 FIP, creating the possibility that his results could regress.

His difficult 2025 campaign also supports limiting any offer to a short-term commitment. Quantrill posted a 6.04 ERA and 1.45 WHIP in 117.2 innings over 26 starts with the Miami Marlins and Atlanta Braves.

Arizona would not need to guarantee Quantrill a rotation position. He could enter camp competing for a starting job while remaining available for a multi-inning relief assignment should the Diamondbacks choose another option.

That adaptability would give manager Torey Lovullo an experienced pitcher capable of covering innings in several situations.

Quantrill could replace an injured starter, provide relief when someone exits early or help protect the bullpen during demanding stretches of the schedule.

His willingness to move between assignments would also allow Arizona to manage the workloads of its other starters more carefully. Burnes is returning from significant physical issues, while the rest of the rotation will still require dependable coverage behind it.

Quantrill’s rebound with Texas showed that one difficult season did not prevent him from becoming productive again. That response matters for a pitcher who may be asked to accept an uncertain role rather than receiving a guaranteed place in the rotation.

He also offers the experience of pitching for several organizations and adjusting to different coaching staffs, teammates and expectations. That background could help him settle into Arizona without requiring an extended transition.

The Diamondbacks would still need to account for the gap between his traditional results and underlying numbers. A short-term contract would reduce that risk while giving Quantrill another opportunity to prove his 2026 performance was sustainable.

For a team facing multiple rotation departures, his ability to handle different responsibilities could make him a practical and affordable addition.