Astros Prized Free Agent Tatsuya Imai Struggling to Adjust to MLB Lifestyle

The Japanese pitcher has had a difficult transition both on and off the field in his first MLB season.

Apr. 15, 2026 at 12:33am

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A fragmented, geometric painting depicting a baseball pitcher's motion broken down into sharp, overlapping planes of color, conceptually representing the challenges of transitioning to a new league and lifestyle.A cubist interpretation of a Japanese pitcher's struggle to adapt to the demands of Major League Baseball.Houston Today

Tatsuya Imai, the Houston Astros' prized free agent signing from the Nippon Professional Baseball (NPB) league in Japan, has struggled to adjust to the MLB lifestyle both on and off the field. In his first three starts, Imai has posted a 7.27 ERA and has been placed on the injured list with arm fatigue. The 27-year-old right-hander revealed that the transition from Japan to the United States has been challenging, citing differences in travel, meal schedules, and the overall lifestyle as factors contributing to his early-season struggles.

Why it matters

Imai was seen as a key offseason acquisition for the Astros, who were looking to bolster their starting rotation after the departure of Framber Valdez. His struggles highlight the challenges that international players often face when transitioning to the MLB, both in terms of the on-field adjustments and the off-field lifestyle changes. The Astros will need Imai to find his footing if they hope to compete in the tough AL West division.

The details

In three starts this season, Imai has allowed seven earned runs in 8.2 innings, while striking out 13 but walking 11 batters. Despite the poor results, the right-hander's stuff has shown promise, with a 35.1% whiff rate. Imai revealed that the main reason for his struggles is his inability to adjust to the American lifestyle, particularly the differences in travel and meal schedules compared to his experience in the NPB. The Astros are optimistic that Imai will be able to increase his arm strength and resume throwing soon, but there is no set timetable for his return.

  • On Monday, Imai was placed on the injured list with arm fatigue.
  • On Tuesday, Imai spoke to the media and revealed the reasons behind his struggles.

The players

Tatsuya Imai

A 27-year-old right-handed pitcher who signed a three-year deal with the Houston Astros this offseason after a successful career in Japan's Nippon Professional Baseball (NPB) league.

Framber Valdez

The Astros' former ace who left the team via free agency this offseason.

Mike Burrows

A pitcher acquired by the Astros in a trade this offseason.

Joe Espada

The manager of the Houston Astros.

Roki Sasaki

A highly touted pitcher from Japan who has also struggled with the transition to the MLB with the Los Angeles Dodgers.

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What they’re saying

“I'm just not able to adjust to the American lifestyle, other than baseball. Baseball and outside of baseball. That's probably the reason [for his arm fatigue].”

— Tatsuya Imai, Astros Pitcher

“For example, the travel is different from Japan. The timing when the players eat. In Japan, when they get back to the hotel, they eat their dinner. Here, the players eat at the stadium.”

— Tatsuya Imai, Astros Pitcher

What’s next

The Astros will increase Imai's arm strength before he resumes throwing, but there is no set timetable for his return to the mound.

The takeaway

Imai's struggles highlight the challenges international players face when transitioning to the MLB, both in terms of on-field adjustments and off-field lifestyle changes. The Astros will need Imai to find his footing if they hope to compete in the tough AL West division, but the team remains optimistic that he can overcome these early-season hurdles.