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Knipp (elbow) was assigned to Single-A Inland Empire on June 5 and made his debut for the affiliate a day later, striking out a batter and scattering one hit and two walks over a scoreless inning.
Knipp hasn't pitched for Inland Empire since making his debut, though it's unclear if his absence over the past week was the result of a setback or simply part of a workload-management plan coming off Tommy John surgery, which he underwent in early 2025. Before joining Inland Empire, Knipp made six appearances in the rookie-level Arizona Complex League, where he turned in a 5.68 ERA, 1.26 WHIP and 10:2 K:BB over 6.1 innings.
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Mariners' Grant Knipp: Targeting June debut
Rotowire
Knipp (elbow) is tentatively slated to return to game action in June, Jonathan Mayo of MLB Pipeline reports.
Knipp underwent Tommy John surgery in early 2025 after dealing with elbow inflammation in spring training. The 24-year-old righty has yet to make his pro debut after being selected in the sixth round of the 2024 draft.
