Imai Returns to Astros Rotation Despite Control Crisis — and Houston Has No Other Option

Tatsuya Imai is returning to the Houston rotation for next week's series against Seattle at Daikin Park, the Astros confirmed Wednesday — and the decision has nothing to do with performance. In his most recent Triple-A rehab start for Sugar Land, Imai walked five batters in three innings against Albuquerque, issued four free passes in the third inning alone, and converted just 27 of 63 pitches into strikes. The command issues that landed him on the injured list in April are still present. He's coming back anyway.

As MLB.com reported, manager Joe Espada framed the recall as a vote of confidence. The real context is starker: Houston has seven starting pitchers on the IL, including Opening Day starter Hunter Brown and veteran Cristian Javier, both dealing with Grade 2 right shoulder strains. Hayden Wesneski, Ronel Blanco, and Brandon Walter all underwent Tommy John surgery last year. Imai isn't healthy — he's available. There's a difference. The Astros signed him to a three-year, $54 million deal in January, and at this point the contract is functioning more as rotation filler than asset.

The mechanical picture is concerning. Imai is operating primarily as a two-pitch pitcher in the majors — fastball at 48% usage, slider at 43% — and neither offering has generated the zone presence necessary to keep lineups honest. GM Dana Brown pointed toward pitch mix expansion as part of the solution, suggesting Imai needs to deploy his splitter, curveball, and changeup more aggressively rather than leaning on two pitches hitters are now sitting on. The adjustment from NPB to MLB involves more than ball feel and mound height; it's a psychological rewiring of how to attack a lineup, and Imai is visibly still mid-process. A 7.27 ERA in three starts, followed by a IL stint and a continued walk-heavy rehab, is not a pitcher who has turned the corner.

For bettors, the Imai start against Seattle carries real implications for both the Astros team total and first-five-inning lines. The Mariners are one of the more disciplined lineups in the AL — they work counts, draw walks, and punish pitchers who can't throw first-pitch strikes. Against a pitcher surrendering walks at an extraordinary rate in both the majors and Triple-A, the first-inning run expectation climbs sharply. The NRFI market for any Imai start deserves scrutiny; a pitcher who walked four batters in a single inning last week is not a strong NRFI lean regardless of opponent. On the strikeout prop side, Imai's 43% slider usage gives him ceiling for punchouts, but without command of the fastball to set it up, the pitch sequences that generate swing-and-miss become harder to execute. His K prop is a fade until the walk rate stabilizes.

The broader team total picture in Houston games when Imai pitches is one of elevated variance. Short outings — his April 10 appearance lasted one out — force the bullpen early and inflate run-scoring environments for both sides. Until Imai demonstrates he can routinely work into the fifth inning, the Astros are essentially deploying an opener with a starter's contract, and team totals should be priced accordingly. Lean toward overs in Imai starts, and treat the first-five-inning line as compromised on the Houston side.