15-Day IL
Injury Pectoral
Est. Return 7/17/2026
2026 Stats
W-L
1-0
ERA
3.92
WHIP
1.35
K
17
SV
0
Rest-of-Season Projections
Signed a one-year contract with the Mariners in March of 2026. Claimed off waivers by the Rockies in April of 2026.
Closing in on throwing program
Castano (pectoral) is expected to begin a throwing program next week, MLB.com reports.
Analysis
Castano will need more than a week to build up as he works his way back from a right pectoral strain, so he doesn't appear to be in line to return from the 15-day injured list until after the All-Star break. Before landing on the shelf June 21, Castano turned in a 3.92 ERA, 1.35 WHIP and 17:6 K:BB in 20.2 innings over 10 appearances out of the Colorado bullpen.
Castano will need more than a week to build up as he works his way back from a right pectoral strain, so he doesn't appear to be in line to return from the 15-day injured list until after the All-Star break. Before landing on the shelf June 21, Castano turned in a 3.92 ERA, 1.35 WHIP and 17:6 K:BB in 20.2 innings over 10 appearances out of the Colorado bullpen.
Pitching Stats
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2026 MLB Game Log
2026
2025
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
34
Last 10 Games
34
Last 5 Games
31
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 2024
-55%
BAA vs RHP
2026
-58%
BAA vs RHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2024vs Left | .388 | 3 | 6 | 19 | 4 | |||
| Since 2024vs Right | .175 | 15 | 2 | 7 | 1 | |||
| 2026vs Left | .417 | 2 | 4 | 15 | 3 | |||
| 2026vs Right | .175 | 15 | 2 | 7 | 1 | |||
| 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 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2024
-62%
ERA on Road
2026
-56%
ERA on Road
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2024Home | 6.39 | 1.82 | 12.2 | 7.1 | 3.6 | ||||
| Since 2024Away | 2.45 | 1.00 | 11.0 | 6.5 | 2.5 | ||||
| 2026Home | 5.59 | 1.76 | 9.2 | 8.4 | 2.8 | ||||
| 2026Away | 2.45 | 1.00 | 11.0 | 6.5 | 2.5 | ||||
| 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 | ||||
| More Splits→ | View More Split Stats | ||||||||
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
2.83K/9
7.4BB/9
2.6HR/9
1.7Fastball
94.2 mphERA
3.92WHIP
1.35BABIP
.304GB/FB
1.61Left On Base
84.8%Exit Velocity
88.0 mphBarrels/BBE
8.5%Spin Rate
2188 rpmBalls Hit 95+ MPH
39.3%Swinging Strike
9.0%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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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.
More Fantasy News
Shelved with pec strain
The Rockies placed Castano on the 15-day injured list Sunday due to a right pectoral strain.
Analysis
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Called up Thursday
Castano was called up from Triple-A Albuquerque on Thursday.
Analysis
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Demoted to Triple-A
Castano was optioned to Triple-A Albuquerque on Monday, Patrick Saunders of The Denver Post reports.
Analysis
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Back in majors
The Rockies recalled Castano from Triple-A Albuquerque on Sunday.
Analysis
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Headed back to Triple-A
Castano was optioned to Triple-A Albuquerque after Sunday's doubleheader sweep of the Mets.
Analysis
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