Astros' Tatsuya Imai Highlighted as 'Must-Watch' Pitcher in Spring Training

The Japanese star looks to fill big shoes left by Framber Valdez's departure to the Tigers.

Feb. 11, 2026 at 3:31pm

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The Houston Astros have signed Japanese pitcher Tatsuya Imai to a three-year deal, and he is being highlighted as a 'must-watch' pitcher in Spring Training this year. Imai, a former Saitama Seibu Lions star, is the latest Japanese ace to come to the MLB, following in the footsteps of players like Shohei Ohtani and Roki Sasaki. MLB.com's David Adler has compared Imai's pitching style to that of Seattle Mariners All-Star Luis Castillo, and fans will be eager to see if Imai can live up to those lofty expectations as he looks to fill the void left by Framber Valdez's departure to the Detroit Tigers.

Why it matters

The Astros are hoping Imai can help them return to the postseason after losing a key part of their rotation in Framber Valdez. Imai's successful transition to the MLB could be crucial for Houston's chances in 2026, and fans will be closely watching his progress in Spring Training.

The details

Imai, 28, spent the last nine seasons playing for the Saitama Seibu Lions in Japan's Nippon Professional Baseball (NPB) league, where he was a three-time All-Star and pitched a combined no-hitter in April. The Astros signed him to a three-year deal in January, hoping he can fill the void left by Valdez's departure to the Tigers on a three-year, $115 million contract.

  • Imai signed a three-year deal with the Astros in January 2026.
  • Imai pitched a combined no-hitter for the Saitama Seibu Lions in the NPB in April.

The players

Tatsuya Imai

A 28-year-old Japanese pitcher who spent the last nine seasons playing for the Saitama Seibu Lions in Japan's Nippon Professional Baseball (NPB) league, where he was a three-time All-Star and pitched a combined no-hitter.

Framber Valdez

A former starting pitcher for the Houston Astros who recently signed a three-year, $115 million contract with the Detroit Tigers.

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What they’re saying

“Imai is the latest Japanese ace to come to the Major Leagues, following Roki Sasaki in 2025, Yoshinobu Yamamoto and Shota Imanaga in 2024 and Kodai Senga in 2023. The former Saitama Seibu Lions star looks a lot like Seattle Mariners All-Star Luis Castillo as a pitcher, but there's only one way to say for sure: Watch Imai at his first Spring Training with Houston, where he'll play a major role in 2026 with Framber Valdez departing for the Tigers.”

— David Adler, MLB.com writer (MLB.com)

What’s next

Fans will be eager to see how Imai performs in his first Spring Training with the Astros, as he looks to prove he can successfully transition from the NPB to the MLB and fill the void left by Framber Valdez's departure.

The takeaway

The Astros' signing of Tatsuya Imai represents their effort to reload their pitching staff after losing a key piece in Framber Valdez. Imai's successful transition to the MLB could be crucial for Houston's chances in 2026, and his performance in Spring Training will be closely watched by fans hoping he can live up to the lofty expectations set for him.