Jan. 1, 2026, 3:12 p.m. ET
Astros Ink Japanese Pitcher Tatsuya Imai to Three-Year Deal
Table of Contents
Houston adds a key arm to their rotation, securing a deal with free agent right-hander Tatsuya Imai just before a crucial deadline.
- Tatsuya Imai, a standout pitcher in Nippon Professional Baseball, has agreed to a three-year contract with the Houston Astros.
- The deal, potentially worth up to $63 million, includes opt-out clauses for the player.
- Imai’s agent, Scott Boras, drew comparisons between his client and Dodgers star Yoshinobu Yamamoto.
- The agreement was finalized one day before Imai’s 45-day signing window with MLB teams was set to expire.
The Houston Astros have added a significant piece to their pitching staff, reaching an agreement with free agent right-hander Tatsuya Imai on a three-year contract with opt-out clauses, multiple news outlets reported on Thursday. The deal, which could be worth up to $63 million, comes as Imai’s window to sign with a Major League Baseball team was nearing its close.
A Race Against the Clock
Imai’s signing with the Astros arrives just one day before his 45-day period to negotiate with MLB clubs was scheduled to end on Friday, Jan. 2. The 27-year-old pitcher had received offers with longer terms but opted for the Astros’ deal, prioritizing a higher average annual value and the flexibility of opt-out options, according to MLB.com.
Impressive Stats from Japan
In 2025, Imai posted a stellar 10-5 record with a 1.92 ERA, racking up 178 strikeouts and 45 walks across 163⅔ innings for the Seibu Lions of Nippon Professional Baseball. Throughout his eight seasons with Seibu, he compiled a 58-45 record with a 3.15 ERA, totaling 907 strikeouts in 963⅔ innings pitched.
What is Wins Above Replacement (WAR)? WAR is a sabermetric statistic that measures a player’s total contribution to their team, expressed in terms of how many wins they add compared to a replacement-level player.
Yamamoto Comparisons
Imai’s agent, Scott Boras, recently likened his client to Yoshinobu Yamamoto, the 2025 World Series MVP who signed a lucrative 12-year, $325-million contract with the Los Angeles Dodgers prior to the 2024 season. The comparison highlights the potential impact Imai could have on the Astros’ pitching rotation.
The deal includes $54 million guaranteed, with Imai set to earn $18 million annually, plus the potential for up to $3 million in performance bonuses, bringing the total possible annual earnings to $21 million, as reported by MLB reporter Jon Heyman.