Blas Castano
Pitcher · Career Stats, Bio & Records (2025-2026)
Blas Castano is a pitcher who has played in Major League Baseball since 2025 for the Seattle Mariners and the Colorado Rockies, a span of 2 seasons. Across 16 career appearances, he has gone 2-0 with a 4.15 ERA and 22 strikeouts.
- W (Wins):
- Games credited to a pitcher whose team took a lead it never surrendered while he was the pitcher of record.
- ERA (Earned Run Average):
- Earned runs allowed per nine innings pitched: (ER × 9) ÷ IP. The primary measure of pitching effectiveness.
- SO (Strikeouts):
- For a batter, times retired on a third strike; for a pitcher, batters retired on a third strike.
- WHIP (Walks and Hits per Inning Pitched):
- Baserunners allowed per inning: (BB + H) ÷ IP. Under 1.00 is elite.
Data updated
- Position
- Pitcher
- Bats / Throws
- R / R
- Height / Weight
- 5'10" / 162 lb
- MLB Debut
- 2025-05-28
- Jersey
- #63
Season-by-Season Pitching
Click a stat to plot it across every season.
| Year | Team | Lg | W | L | G | GS | CG | SHO | SV | IP | H | ER | BB | SO | ERA | Lg ERA | Pitcher PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | SEA | AL | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 3.0 | 4 | 3 | 2 | 1 | 9.00 | — | 0.0 |
| 2026 | COL | NL | 2 | 0 | 15 | 0 | 0 | 0 | 0 | 27.1 | 27 | 11 | 9 | 21 | 3.62 | 4.18 (+13%) | - |
| Career · 2 seasons | 2 | 0 | 16 | 0 | 0 | 0 | 0 | 30.1 | 31 | 14 | 11 | 22 | 4.15 | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Season-by-Season Batting
Click a stat to plot it across every season.
| Year | Team | Lg | G | AB | R | H | 2B | 3B | HR | RBI | SB | BB | SO | AVG | Lg AVG | Lg OBP | Lg SLG | Lg OPS | PIV |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2025 | SEA | AL | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | .000 | — | — | — | — | 0.0 |
| Career · 1 season | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | 0 | ||
Lg columns show the league average for that season, with the player's figure as a percentage above or below it. Career totals the seasons listed above.
Game Log & Splits
Per-game data from Retrosheet (regular season, through 2025).
Batting — Home / Away
| Split | G | AB | R | H | HR | RBI | AVG |
|---|---|---|---|---|---|---|---|
| Home | 1 | 0 | 0 | 0 | 0 | 0 | — |
Pitching — Home / Away
| Split | G | IP | H | ER | BB | SO | ERA |
|---|---|---|---|---|---|---|---|
| Home | 1 | 3.0 | 4 | 3 | 2 | 1 | 9.00 |
Last 1 Games — Pitching
| Date | Tm | Opp | Dec | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|---|---|
| 2025-05-28 | SEA | WAS | — | 3.0 | 4 | 3 | 3 | 2 | 1 | 1 |
Career Games by Position
Circle size = games played at each position.
| Position | Games |
|---|---|
| Pitcher | 1 |
Blas Castano: the record in brief
Active since a debut on May 28, 2025, Blas Castano has a record on this page that is still being added to. Castano's only club in the season tables is the Seattle Mariners. Castano played primarily as a pitcher and both batted and threw right-handed. Born on September 8, 1998, in Espaillat, Espaillat, D.R., Castano was listed at 162 pounds on a 5-foot-10 frame.
Castano has pitched in 16 games, starting 0, and owns a 2-0 record and 4.15 ERA. The same table counts 22 strikeouts. Castano's 4.15 ERA was close to the 4.17 league figure for those seasons. In 2026, one of the busiest seasons, Castano posted a 3.62 ERA; the league figure that year was 4.18.
Every defensive appearance on record for Castano, 1 games, came at pitcher.
Frequently Asked Questions about Blas Castano
- What years did Blas Castano play?
- Blas Castano played in Major League Baseball from 2025 to 2026.
- Was Blas Castano a pitcher?
- Yes. Blas Castano pitched in the major leagues, recording 2 wins and 22 strikeouts.
- What teams has Blas Castano played for?
- Blas Castano has played for 2 teams: the Seattle Mariners (2025) and the Colorado Rockies (2026).
- What are Blas Castano's career stats?
- In 16 games, Blas Castano has gone 2-0 with a 4.15 ERA, 22 strikeouts, and 30.1 innings pitched.
- What position does Blas Castano play?
- Blas Castano plays primarily as a pitcher, the position where he has appeared in the most games.
- How tall is Blas Castano and how much does he weigh?
- Blas Castano is listed at 5 feet 10 inches and 162 pounds.
- What number does Blas Castano wear?
- Blas Castano wears number 63, according to MLB's 2026 roster data.
- What was Blas Castano's career ERA?
- Blas Castano finished with a 4.15 career ERA, going 2-0 with 22 strikeouts.
- How many strikeouts did Blas Castano have?
- Blas Castano recorded 22 career strikeouts.