
The Houston Astros had high expectations for Tatsuya Imai after he signed a three-year, $54 million contract in January.
However, the 28-year-old struggled to adjust to MLB hitting in his first full major league season. Over Imai’s first 15 starts, a stretch that included a month-long stint on the injured list due to right-arm fatigue, he went 6-4 with a 5.83 ERA and 1.53 WHIP over 58.2 innings. His command was a major concern: Imai issued 40 walks while recording 72 strikeouts.
On July 31, manager Joe Espada announced that Imai would shift to the bullpen after struggling as a starter. The move proved effective: the former NPB star posted six scoreless outings in eight relief appearances to close out the regular season.
During that span, Imai posted a 2.00 ERA over 18 innings. His command also improved, as he recorded 25 strikeouts against 11 walks.
Overall, Imai finished 2026 with a 4.93 ERA and 1.42 WHIP over 76.2 innings, with 97 strikeouts and 51 walks. His stuff is there, as shown by his impressive .207 batting average against, but his performance was inconsistent.
Tatsuya Imai has an opt-out decision ahead after the first season of his 3-year/$54M deal.
— SleeperAstros (@SleeperAstros) October 4, 2026
His 2026 splits:
Starter: 15 GS | 58.2 IP | 5.83 ERA | .229 BAA
Bullpen: 8 G | 18 IP | 2.00 ERA | .129 BAA
Six of his eight relief appearances were scoreless, and four lasted three… pic.twitter.com/PHHz4p7XGD
Imai’s splits suggest he’ll be better as a reliever going forward. But Houston has numerous offseason questions surrounding its pitching that could complicate his potential role next season.
Imai has $36 million remaining on his contract with player options for 2027 and 2028. Although he hasn’t decided whether to exercise his 2027 option, it’s hard to imagine Imai passing up that money after a less-than-ideal first year in the majors.
With Imai likely back with the Astros, the question becomes how they will use him.
On the surface, the answer should undoubtedly be to keep him in the bullpen: his 2.00 ERA over eight relief appearances speaks for itself. Furthermore, the fact that high-leverage relievers Bryan Abreu (3.73 ERA) and Steven Okert (2.13 ERA) are both set to become unrestricted free agents further supports Imai’s case.
However, Houston’s starting pitching depth also needs an upgrade. Peter Lambert was the only Astros starter to pitch more than 150 innings this season (155.2), and Hunter Brown was the only other starter to surpass 100 (107.1).
Yes, injuries played a major role, with Cristian Javier and Ronel Blanco missing significant time. But even when healthy, both starters struggled. Javier went 2-6 with a 5.14 ERA over 17 games (12 starts), while Blanco posted a 6.68 ERA over eight games (five starts).
Those rough numbers further magnified Houston’s starters’ 4.81 ERA, which ranked fourth-worst in MLB this season.
Yet inserting Imai back into the starting rotation may not be the best move. Of his 15 starts, he pitched at least five innings just seven times. Even more worrisome, Imai didn’t even make it out of the first inning in three of them.
Tatsuya Imai vs. Angels:
— Underdog MLB (@UnderdogMLB) July 28, 2026
0.2 IP
2 ER
1 H
4 BB
33 Pitches
3rd time this season he hasn’t gotten out of first inning. pic.twitter.com/17koL1XLcY
The Astros need to revamp their pitching staff, from the starting rotation to the bullpen, this offseason. Those moves will likely have a significant impact on Imai’s future role with Houston.
But wherever he finds himself, Imai will have to improve and live up to the expectations he set when he signed that lucrative contract in January.
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