Tatsuya Imai

27-Year-Old PitcherP
 Free Agent  Foreign
2026 Fantasy Outlook
Imai is looking to become the latest in a growing group of Japanese starting pitchers to successfully make the jump from NPB to MLB. He had an outstanding 2025 season for the Saitama Seibu Lions, with career bests in both ERA (1.92) and WHIP (0.89). NPB is in a dead-ball era right now, with league-wide ERA dropping to 3.01 last year, so those figures are a little less dominant than they may seem, but they came with career bests in both K% (27.8%) and BB% (7.0%). That latter is particularly notable, as Imai struggled significantly with control early in his career and had never previously produced a BB% better than 9.8%. Imai is undersized at 5-foot-11, but he has decent fastball velocity (94.8 mph), a five-pitch mix and a deceptive, low-slot delivery. If the command gains stick around, he should be able to get big-league hitters out, though don't expect dominance on the same level as Yoshinobu Yamamoto, who had three straight seasons with an ERA south of 1.70 before making the leap. Read Past Outlooks
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Rest of Season From Preseason
Officially posted for MLB teams
PFree Agent  F
November 18, 2025
The Seibu Lions of Nippon Professional Baseball have posted Imai for major-league teams, Jon Morosi of MLB Network reports.
Analysis
While the postseason process has begun, teams will not be allowed to formally enter negotiations with Imai and his agent, Scott Boras, until Wednesday morning. Imai and Boras will have 45 days to reach an agreement with a major-league club. The 27-year-old is expected to land a contract north of $150 million after posting a 1.92 ERA and 178:45 K:BB over 163.2 innings for the Lions during the 2025 season.
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More Fantasy News
Set to be posted Nov. 19
PFree Agent  F
November 12, 2025
Imai's agent, Scott Boras, said Wednesday that his client will be posted for major-league teams Nov. 19, Will Sammon of The Athletic reports.
Analysis
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Will be posted for MLB clubs
PFree Agent  F
November 10, 2025
The Seibu Lions of Nippon Professional Baseball announced Monday that they will post Imai for major-league teams this offseason, Maria Torres of The Athletic reports.
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Latest Fantasy Rumors
Yankees, Cubs likely finalists
PFree Agent  F
December 17, 2025
The Yankees and Cubs are expected to be among the finalists to sign Imai, Francys Romero of BeisbolFR.com reports.
Analysis
Romero notes that around five teams have displayed real interest in signing Imai. It's unclear whether the Yankees and Cubs have distanced themselves from those other clubs, but they appear to be two of the most likely landing spots for the Japanese hurler. Imai's posting window closes Jan. 2, so he must sign with a team before then. The 27-year-old held a 1.92 ERA and 178:45 K:BB over 163.2 innings for the Seibu Lions of Nippon Professional Baseball during the 2025 season.
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