Players · C · Pitcher · 2026
Blas Castaño
- Age
- 28
- B/T
- R/R
- Height
- 5' 10"
- Weight
- 162 lb
- Number
- #63
- Born
- September 8, 1998 in Espaillat, Dominican Republic
- MLB debut
- May 28, 2025
- dbWAR
- -.1 2 season(s)
- IP
- 27.1
- ERA
- 3.62
- FIP
- 4.68
- K/9
- 6.9
- FIP−
- 112 100 = avg
Blas Castaño is a relief pitcher for the Colorado Rockies. In 2026 he struck out 21 batters over 27.1 innings across 15 appearances, going 2-0. His ERA of 3.62 is 13.3% lower than the league average of 4.18 — the second best on his team, and 186th of 538 among MLB pitchers with 20+ innings. Stripping out defence, his 4.68 FIP suggests that his ERA had some help behind him. He missed bats on 18.6% of swings (8.7% of every pitch he threw), walked 8.1% of the batters he faced and struck out 18.9%. His 0.0 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.
WAR by season
Pitching
Standard and advanced, by season.
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 | 55 | 47 | 19 | 3 | 6 | 4 | .404 | .473 | .702 | .496 | 7.3% |
| vs RHB | 56 | 52 | 8 | 1 | 3 | 17 | .154 | .214 | .250 | .213 | 30.4% |
Pitch sequencing
What Blas Castaño throws in each count, and what he follows each pitch with. Select any cell for the breakdown.
Select a count to see exactly what Blas Castaño throws in it.
Pitch arsenal
What he throws, how hard, how often it misses, and what hitters do with it.
| Sinker | 186 | 94.1 | 2,130 | 53.8% | 13.3% | 32 | .219 | .637 | |
| Sweeper | 108 | 82.8 | 2,578 | 42.6% | 34.0% | 23 | .174 | .600 | |
| Cutter | 64 | 90.5 | 2,428 | 48.4% | 17.2% | 11 | — | — | |
| Four-Seam Fastball | 55 | 94.5 | 2,238 | 49.1% | 12.1% | 19 | .158 | .396 | |
| Changeup | 47 | 89.0 | 1,527 | 34.0% | 17.4% | 15 | .333 | .800 |
Head to head
Put Blas Castaño 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.