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The New York Mets have made their move on Kodai Senga, even if they have not fully defined what it means yet.

Less than a day after Senga questioned his place in the rotation following another short outing, the Mets placed him on the 15-day injured list with lumbar spine inflammation. In a corresponding move, they recalled Christian Scott from Triple-A Syracuse, signaling an immediate shift in the rotation.

The timing is not subtle. Senga had just delivered three consecutive starts without reaching the fourth inning, watching his ERA rise to 9.00 while his command and ability to manage early innings continued to collapse.

Manager Carlos Mendoza had already called the performance “not good enough” and confirmed conversations with David Stearns were coming. The injured list now replaces what was building toward a far more direct and potentially uncomfortable decision.

The IL Move Creates Flexibility, Not Clarity

GettyKodai Senga #34 of the New York Mets delivers a pitch against the St. Louis Cardinals in the first inning at Busch Stadium on March 31, 2026 in St Louis, Missouri. (Photo by Dilip Vishwanat/Getty Images)

From a roster standpoint, the IL gives the Mets an immediate solution without forcing a long-term answer. Instead of deciding whether to demote Senga or remove him from the rotation outright, the team can step back and frame the move around health while addressing his struggles behind the scenes.

According to SNY, Senga’s role had already become untenable given his inability to pitch deep into games. That aligns with reporting from Bob Nightengale, who noted that the Mets chose this route instead of a minor-league demotion. That distinction matters because it avoids a potentially difficult negotiation. Senga had been non-committal when asked about accepting a Triple-A assignment, indicating that such a decision would require significant discussion.

The IL eliminates that friction in the short term. It allows Senga to step away from game action while working through his mechanics without the pressure of immediate results. It also allows the Mets to maintain control of the messaging, presenting the move as injury-related even as performance concerns clearly played a role.

At the same time, the injury itself introduces a layer of complexity. Lumbar spine inflammation can impact mechanics, timing, and velocity, which have all been inconsistent during Senga’s recent stretch. The Mets can reasonably point to a physical issue contributing to the decline, but Senga himself has consistently described the problem as mechanical. That disconnect raises questions about whether the IL stint is a true diagnosis or a strategic pause.

The Real Decision Is Still Coming

GettyKodai Senga #34 of the New York Mets delivers a pitch during the first inning against the Chicago Cubs at Wrigley Field on April 17, 2026 in Chicago, Illinois. (Photo by Michael Reaves/Getty Images)

While Scott is expected to step into the rotation, the Mets have not solved their larger problem. They have simply delayed it.

When Senga returns, the organization will still need to define his role. The bullpen remains an imperfect fit given his routine, and the Mets already have multiple starters adjusting to relief roles. A return to Triple-A, which was part of his 2025 season, remains a realistic option if the team believes he needs extended work away from the major-league level.

What has changed is the margin for patience. The Mets have rotation depth, and that depth limits how long they can wait for Senga to rediscover consistency. Every short outing has ripple effects on the bullpen and the team’s ability to stay competitive. That reality has already forced action once.

Senga has been clear that he believes he knows what is wrong. The Mets now need to see whether that belief translates into results. If it does, this IL stint becomes a necessary reset. If it does not, the next decision will be far more definitive, and far more difficult to avoid.