2025 Stats
W-L
0-0
ERA
9.00
WHIP
2.00
K
1
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
An undersized (5-foot-10, 162 pounds) 26-year-old righty with no big-league experience, Castano was added to the Mariners' 40-man roster this offseason to protect him from the Rule 5 draft. Castano originally signed with the Yankees in 2018 out of the Dominican Republic but was released in 2023, which is when Seattle signed him. He split 2024 between Double-A and Triple-A, logging an excellent 53.5 percent groundball rate, but a mediocre 12.0 K-BB% in 125.1 innings. He only pitches out of the stretch and may make his big-league debut as a reliever, but Castano has enough pitches to be a back-end starter if injuries were to clear a path in 2025. Read Past Outlooks
Signed a one-year contract with the Mariners in May of 2025.
Demoted to Triple-A
The Mariners optioned Castano to Triple-A Tacoma on Thursday.
Analysis
Castano joined the Mariners' bullpen after being called up May 23 and made his MLB debut May 28. It was the lone appearance he made as he allowed three earned runs on three hits and two walks across three innings of relief. As a corresponding move Thursday, Casey Lawrence was selected from Triple-A Tacoma
Castano joined the Mariners' bullpen after being called up May 23 and made his MLB debut May 28. It was the lone appearance he made as he allowed three earned runs on three hits and two walks across three innings of relief. As a corresponding move Thursday, Casey Lawrence was selected from Triple-A Tacoma
Pitching Stats
Loading Pitching Stats...
2025 MLB Game Log
2025
Minor League Game Log
Calculate Stats Over Time
Just click on any two dates.
Loading Minor League Pitching Game Log...
Pitching Appearances Breakdown
Average Pitch Count
50
Last 10 Games
50
Last 5 Games
50
How many pitches does Blas Castano generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Blas Castano generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-100%
BAA vs RHP
2025
-100%
BAA vs RHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .308 | 1 | 2 | 4 | 1 |
| Since 2023vs Right | 0 | 0 | 0 | 0 | 0 |
| 2025vs Left | .308 | 1 | 2 | 4 | 1 |
| 2025vs Right | 0 | 0 | 0 | 0 | 0 |
| 2024vs Left | 0 | 0 | 0 | 0 | 0 |
| 2024vs Right | 0 | 0 | 0 | 0 | 0 |
| 2023vs Left | 0 | 0 | 0 | 0 | 0 |
| 2023vs Right | 0 | 0 | 0 | 0 | 0 |
Home/Away Pitching Splits
Since 2023
-100%
ERA on Road
2025
-100%
ERA on Road
| ERA | WHIP | IP | K/9 | BB/9 | |
|---|---|---|---|---|---|
| Since 2023Home | 9.00 | 2.00 | 3.0 | 3.0 | 6.0 |
| Since 2023Away | 0 | 0 | 0 | 0 | 0 |
| 2025Home | 9.00 | 2.00 | 3.0 | 3.0 | 6.0 |
| 2025Away | 0 | 0 | 0 | 0 | 0 |
| 2024Home | 0 | 0 | 0 | 0 | 0 |
| 2024Away | 0 | 0 | 0 | 0 | 0 |
| 2023Home | 0 | 0 | 0 | 0 | 0 |
| 2023Away | 0 | 0 | 0 | 0 | 0 |
Minor League Left/Right Pitching Splits (AAA)
Since 2023
-8%
BAA vs RHP
2025
-9%
BAA vs LHP
| BAA | K | BB | H | HR | |
|---|---|---|---|---|---|
| Since 2023vs Left | .280 | 62 | 34 | 88 | 14 |
| Since 2023vs Right | .257 | 112 | 40 | 118 | 13 |
| 2025vs Left | .249 | 38 | 23 | 51 | 6 |
| 2025vs Right | .274 | 59 | 27 | 74 | 8 |
| 2024vs Left | .343 | 23 | 11 | 35 | 8 |
| 2024vs Right | .240 | 51 | 13 | 44 | 5 |
| 2023vs Left | .286 | 1 | 0 | 2 | 0 |
| 2023vs Right | .000 | 2 | 0 | 0 | 0 |
Stat Review
How does Blas Castano compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
0.50K/9
3.0BB/9
6.0HR/9
3.0Fastball
93.5 mphERA
9.00WHIP
2.00BABIP
.287GB/FB
0.60Left On Base
65.2%Exit Velocity
85.6 mphBarrels/BBE
12.5%Spin Rate
2150 rpmBalls Hit 95+ MPH
29.2%Swinging Strike
2.0%Advanced Pitching Stats
Loading Advanced Pitching Stats...
Defensive Stats
Loading MLB Defensive Stats...
Stats Vs Today's Lineup
Want more matchup stats?
Loading Matchup Stats...
Our full team depth charts are reserved for RotoWire subscribers.
Subscribe Now
More Fantasy News
Call-up official
The Mariners recalled Castano from Triple-A Tacoma on Friday.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Set to receive promotion
The Mariners will recall Castano from Triple-A Tacoma prior to Friday's game in Houston, Francys Romero of BeisbolFR.com reports.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Optioned to Triple-A
The Mariners optioned Castano to Triple-A Tacoma on Friday.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.
Added to 40-man roster
The Mariners selected Castano's contract from Triple-A Tacoma on Monday, Francys Romero of BeisbolFR.com reports.
Analysis
Subscribe now to instantly reveal our take on this news.
Subscribe now to instantly reveal our take on this news.