Pitcher · 2026
Tatsuya Imai
- Age
- 28
- B/T
- R/R
- Height
- 5' 11"
- Weight
- 176 lb
- Number
- #45
- Born
- May 9, 1998 in Kanuma, Japan
- MLB debut
- March 29, 2026
- dbWAR
- .3 1 season(s)
- IP
- 61.2
- ERA
- 5.55
- FIP
- 4.63
- K/9
- 11.2
- FIP−
- 111 100 = avg
Tatsuya Imai is a starting pitcher for the Houston Astros. In 2026 he struck out 77 batters over 61.2 innings across 16 appearances, 15 of them starts, going 6-4. His ERA of 5.55 was 32.8% higher than the league average of 4.18 — 13th of 17 on his team, and 400th of 467 among MLB pitchers with 20+ innings. Stripping out defence, his 4.63 FIP suggests he pitched better than his ERA shows. He missed bats on 32.6% of swings (14.2% of every pitch he threw), walked 14.6% of the batters he faced and struck out 28.1%. His 0.3 dbWAR is built from that FIP rather than runs allowed, so it credits him for what he controls and not for the defence behind him.
League context
Percentile among qualified pitchers, 2026.
Platoon splits
How left- and right-handed hitters fare against him.
| Split | PA | AB | H | HR | BB | SO | AVG | OBP | SLG | wOBA | K% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| vs LHB | 168 | 143 | 36 | 7 | 22 | 45 | .252 | .351 | .441 | .350 | 26.8% |
| vs RHB | 106 | 84 | 14 | 2 | 18 | 32 | .167 | .333 | .250 | .289 | 30.2% |
Pitch sequencing
What Tatsuya Imai throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Tatsuya Imai throws in it.
Pitch arsenal
What he throws, how hard, and how often it misses in 2026.
| Slider | 540 | 86.7 | 2,278 | 49.8% | 40.6% | |
| Four-Seam Fastball | 508 | 94.9 | 1,998 | 44.5% | 19.7% | |
| Sinker | 61 | 94.5 | 1,952 | 41.0% | 18.5% | |
| Splitter | 42 | 84.7 | 1,251 | 21.4% | 75.0% | |
| Changeup | 28 | 86.8 | 1,928 | 46.4% | 62.5% |
Pitching
Standard and advanced, by season.
| Trend | |||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 16 | 15 | 61.2 | 6 | 4 | 0 | 50 | 38 | 77 | 40 | 5.55 | 4.63 | 1.46 | 11.2 | 5.8 | 133 | 111 | 0.3 | — |
Head to head
Put Tatsuya Imai beside up to three others.
Similar players
Nearest 2026 seasons by command, run prevention and role, on rate statistics rather than totals.
wOBA uses linear weights measured from this season's own play-by-play rather than published constants, and wRC+ is park-adjusted against that same league. dbWAR is our own open implementation — not fWAR or bWAR — and the full derivation, including its simplifications, is on the methodology page.