2025 Stats
W-L
4-5
ERA
3.55
WHIP
1.29
K
79
SV
0
Rest-of-Season Projections
2025 Fantasy Outlook
Castillo, for all his abilities, has been rather inconsistent in recent seasons. He has made 30 or more starts in three of the past four seasons and in five of the last six full seasons, but he has just twice won 12 or more games, and his ERA has had a 1.3 run variance. The 2024 season was not his best effort, as a hamstring injury shut him down for good in mid-September. Sixteen of his 25 home runs were of the solo shot variety, yet he still had his highest ERA of the past three seasons. The related issue was a decline in strikeouts, as the 24.3 percent strikeout rate was three full percentage points down from his 2022 and 2023 efforts, and his lowest since that troublesome 2021 season with Cincinnati. A look at the numbers show the changeup, once his signature pitch, was arguable his worst pitch. Castillo is now primarily a fastball and slider guy, and while the four-seamer and slider duo has served him well the past two seasons, he needs a third pitch to re-emerge, as lefties were entirely too comfortable against him in 2024. This is not the making of a fantasy ace. Read Past Outlooks
Signed a five-year, $108 million contact extension with the Mariners in September of 2022. Contract includes $25 million vesting option for 2028.
Solid in no-decision
Castillo didn't factor into the decision Sunday against Texas, allowing one run on seven hits and two walks with four strikeouts over six innings.
Analysis
Castillo pulled himself out of a rough patch Sunday, snaring a quality start and not allowing a home run. The 32-year-old had allowed 16 runs (14 earned) in 22 innings over his previous four starts. He gave up eight home runs during that stretch after having yielded merely four round trippers in his first 12 starts. On the year, Castillo owns a 3.55 ERA, and he's scheduled to face the Pirates next time out.
Castillo pulled himself out of a rough patch Sunday, snaring a quality start and not allowing a home run. The 32-year-old had allowed 16 runs (14 earned) in 22 innings over his previous four starts. He gave up eight home runs during that stretch after having yielded merely four round trippers in his first 12 starts. On the year, Castillo owns a 3.55 ERA, and he's scheduled to face the Pirates next time out.
Pitching Stats
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2025 MLB Game Log
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Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
95
Last 10 Games
97
Last 5 Games
95
How many pitches does Luis Castillo 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 Luis Castillo 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
-15%
BAA vs RHP
2025
-4%
BAA vs RHP
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .251 | 215 | 87 | 219 | 44 | |||
| Since 2023vs Right | .213 | 258 | 48 | 191 | 21 | |||
| 2025vs Left | .254 | 31 | 24 | 43 | 6 | |||
| 2025vs Right | .243 | 48 | 8 | 49 | 6 | |||
| 2024vs Left | .275 | 67 | 27 | 87 | 18 | |||
| 2024vs Right | .205 | 108 | 20 | 71 | 7 | |||
| 2023vs Left | .229 | 117 | 36 | 89 | 20 | |||
| 2023vs Right | .205 | 102 | 20 | 71 | 8 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-26%
ERA at Home
2025
-44%
ERA at Home
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 3.01 | 1.05 | 254.0 | 10.0 | 2.4 | ||||
| Since 2023Away | 4.07 | 1.30 | 214.2 | 8.0 | 2.9 | ||||
| 2025Home | 2.60 | 1.08 | 52.0 | 8.0 | 3.3 | ||||
| 2025Away | 4.67 | 1.53 | 44.1 | 6.7 | 2.6 | ||||
| 2024Home | 3.15 | 1.08 | 97.0 | 9.9 | 1.7 | ||||
| 2024Away | 4.25 | 1.28 | 78.1 | 7.8 | 3.3 | ||||
| 2023Home | 3.09 | 1.00 | 105.0 | 11.1 | 2.6 | ||||
| 2023Away | 3.62 | 1.21 | 92.0 | 8.7 | 2.5 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Luis Castillo compare to other starting pitchers?
This section compares his stats with all starting pitcher seasons from the previous three seasons (minimum 120 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 120 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 120 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
2.47K/9
7.4BB/9
3.0HR/9
1.1Fastball
95.2 mphERA
3.55WHIP
1.29BABIP
.293GB/FB
1.12Left On Base
78.4%Exit Velocity
83.6 mphBarrels/BBE
7.4%Spin Rate
2144 rpmBalls Hit 95+ MPH
27.2%Swinging Strike
11.7%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Past Fantasy Outlooks
2024
2023
2022
2021
2020
2019
2018
2017
The 31-year-old was acquired by the Mariners at the 2022 trade deadline and inked a five-year extension two months later; during his first full season with the team in 2023 he posted a 3.34 ERA, 1.10 WHIP and 219:56 K:BB in 197 innings. The campaign ended on a sour note, however, with nine runs allowed in Castillo's final two starts, including a 2.2-frame outing against Texas that eliminated Seattle from playoff contention. His strikeout and walk rates (27.3 percent and 7.0 percent, respectively) stayed stable, but his 1.3 HR/9 was the highest since his sophomore season in 2018. Castillo typically excelled at inducing groundballs while playing for the Reds with a career rate north of 50 percent, but he saw his flyball rate jump nearly nine points to 42.4 percent in 2023 while his groundball rate dipped below 40 percent. A barrel rate of 9.4 percent and hard-hit rate of 41.8 percent each represent career worsts, which also lines up with a 3.81 xFIP. Some regression may be in store for Castillo if he's unable to rein in those trends, but he's still likely a fairly safe bet for fantasy managers in 2024 given his track record.
More Fantasy News
Allows five runs Tuesday
Castillo allowed five runs on seven hits and two walks while striking out three over five innings in Tuesday's win over the Twins. He did not factor into the decision.
Analysis
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Hurt by homers again
Castillo (4-5) took the loss Wednesday as the Mariners fell 3-1 to the Red Sox, giving up three runs on three hits and two walks over six innings. He struck out five.
Analysis
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Turns in quality start
Castillo allowed two runs on three hits and three walks while striking out seven over six innings in a no-decision Friday versus the Guardians.
Analysis
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Tagged for three homers
Castillo (4-4) allowed six runs (four earned) on eight hits and struck out five without walking a batter over five innings, taking the loss Saturday versus the Angels.
Analysis
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Blanks Twins in no-decision
Castillo didn't factor into the decision Sunday against Minnesota, allowing four hits and two walks with five strikeouts over six scoreless innings.
Analysis
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Latest Fantasy Rumors
Recent trade interest from Orioles
The Orioles and Mariners "have talked before and in recent days" about a trade that would send Castillo to Baltimore, Jon Morosi of MLB Network reports.
Analysis
It's not clear whether some of those discussions took place after the Orioles signed Charlie Morton this past Friday. Castillo is owed $72.45 million over the next three years and has a full no-trade clause, complicating any potential deal. However, the Mariners have reportedly discussed him in trade scenarios this offseason, with the thought that they could either swap him for a bat or clear payroll space and sign a position player.
It's not clear whether some of those discussions took place after the Orioles signed Charlie Morton this past Friday. Castillo is owed $72.45 million over the next three years and has a full no-trade clause, complicating any potential deal. However, the Mariners have reportedly discussed him in trade scenarios this offseason, with the thought that they could either swap him for a bat or clear payroll space and sign a position player.