Kodai Senga takes a first real stumble in back-to-back pitching tests for the Mets

Kodai Senga had passed every bullpen leverage check the Mets staged for him the day before and the day after, until Sunday afternoon at Rate Field, when his back-to-back workload finally met resistance. The turning point came in the ninth inning, after a stretch in which his outings had been structured to mimic high-stakes innings, from late-game pressure to save-setup scenarios.

As described by MLB, the Mets treated the consecutive days as the first sustained practical exam for Senga’s current form. His prior bullpen appearances had been designed in order, moving through the kinds of moments that can reveal whether a pitcher can hold mechanics and command when the margin tightens. Through those earlier tests, he did not show the kind of late-game drop-off that managers and pitching coaches prefer to avoid when a role depends on precision.

Sunday’s ninth inning, however, brought the first noticeable falter in that back-to-back sequence. MLB’s account framed it as a meaningful shift because it happened after the Mets had already worked their way through multiple high-leverage looks, including a save situation on one day and additional late bullpen tests on the other. In practical terms, the organization gets a clearer picture of how Senga responds when he is asked to execute repeatedly rather than showing sharpness in a single appearance.

The storyline also underscores how the Mets are thinking about roles and readiness. The bullpen is not just a collection of arms, it is a set of timing decisions. Whether Senga is viewed as an option for the seventh and eighth can change quickly if the training pattern shows day-to-day effects. A first back-to-back stumble does not automatically end the process, but it does add a new variable to how the Mets manage the next stretch of workload.

MLB also noted that, earlier in the day at Rate Field, Senga communicated with the Mets’ interim leadership, indicating the conversation occurred before the inning that became problematic. That detail matters because it places the ninth inning issue within the same day’s internal readiness discussions, rather than as a disconnected event. It suggests the Mets had specific expectations for his usage or effectiveness that were challenged when the game situation turned in the ninth.

What to watch next is whether the Mets adjust the pattern after this first failure in the back-to-back sequence. The key question is not simply whether Senga can pitch, but whether he can reproduce his earlier command and execution when fatigue and inning-to-inning stress are accumulated. For Mets fans, the watch likely centers on the immediate follow-up plan: another controlled test designed to confirm what went wrong Sunday, or a reset that reduces the back-to-back strain while the team fine-tunes his workload.