Diego Castillo

Diego Castillo

30-Year-Old PitcherRP
Minnesota Twins AAA
2024 Fantasy Outlook
Castillo had a rough 2023 campaign, collecting a 6.23 ERA in eight appearances for the Mariners and a 5.13 ERA and 50:35 K:BB across 47.1 frames at Triple-A Tacoma. Both his velocity and control have trended in the wrong direction in recent seasons. Still, Castillo will turn just 30 next month, and a pitcher with his track record could find a major league job eventually with the Rangers or another team. Read Past Outlooks
RANKS
Rest of Season
From Preseason
$Signed a one-year contract with the Twins in July of 2024.
Loses 40-man roster spot
PMinnesota Twins  AAA
September 29, 2024
Castillo was designated for assignment Sunday.
ANALYSIS
He loses his spot on the 40-man roster on the final day of the season and will be a free agent this offseason. Castillo walked more batters (eight) than he struck out (six) in the big leagues this season and last recorded a save in 2022 with Seattle.
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Pitching Stats
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2024
2023
2022
2021
2020
2019
2018
2024 MLB Game Log
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2023 MLB Game Log
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2022 MLB Game Log
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2021 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
25
Last 10 Games
25
Last 5 Games
23
How many pitches does Diego 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+
 
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+
 
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 Diego Castillo generally pitch?
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
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 2022
 
 
-16%
BAA vs RHP
2024
 
 
-3%
BAA vs LHP
2023
 
 
-30%
BAA vs LHP
2022
 
 
-26%
BAA vs RHP
BAA Batters K BB H 2B 3B HR
Since 2022vs Left .232 112 17 16 22 3 0 3
Since 2022vs Right .195 194 49 21 33 2 1 4
2024vs Left .231 17 2 3 3 0 0 0
2024vs Right .238 26 4 5 5 0 1 0
2023vs Left .167 14 1 2 2 0 0 1
2023vs Right .238 27 6 5 5 1 0 1
2022vs Left .243 81 14 11 17 3 0 2
2022vs Right .181 141 39 11 23 1 0 3
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2022
 
 
-39%
ERA on Road
2024
 
 
-50%
ERA at Home
2023
 
 
-40%
ERA at Home
2022
 
 
-56%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2022Home 4.61 1.27 41.0 3 2 2 7.5 3.7 1.5
Since 2022Away 2.81 1.25 32.0 4 1 5 9.0 5.6 0.0
2024Home 1.80 1.20 5.0 0 0 0 5.4 5.4 0.0
2024Away 3.60 2.00 5.0 0 0 0 5.4 9.0 0.0
2023Home 5.40 1.50 6.2 0 0 0 6.8 8.1 2.7
2023Away 9.00 2.00 2.0 0 0 0 9.0 4.5 0.0
2022Home 4.91 1.23 29.1 3 2 2 8.0 2.5 1.5
2022Away 2.16 1.04 25.0 4 1 5 9.7 5.0 0.0
More Splits View More Split Stats
Stat Review
How does Diego Castillo 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.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
0.75
 
K/9
5.4
 
BB/9
7.2
 
HR/9
0.0
 
Fastball
95.6 mph
 
ERA
2.70
 
WHIP
1.60
 
BABIP
.265
 
GB/FB
1.36
 
Left On Base
81.3%
 
Exit Velocity
84.0 mph
 
Barrels/BBE
1.7%
 
Spin Rate
2206 rpm
 
Balls Hit 95+ MPH
25.4%
 
Swinging Strike
7.9%
 
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
2023
2022
2021
2020
2019
Castillo usually gives you a little bit of everything, including seven wins, nine holds and seven saves last season with Seattle. Historically, strikeouts and solid ratios have been part of the package too, but the right-hander's strikeout rate dropped 8.3 percentage points to a career-low 23.9% last year. Castillo's walk rate went in the wrong direction too, though he's always had trouble with his control, walking over three batters per nine innings for his career. On the plus side, he allowed a mere 30.6% hard hit percentage (95th percentile) with a career-best home run rate (0.8 HR/9). Castillo should reprise his high-leverage role for Seattle in 2023, but Paul Sewald and Andres Munoz are likely ahead of him in the pecking order for saves.
Castillo opened 2021 in Tampa Bay as the team's primary closer, a role that wasn't planned as the Rays like to mix and match in the ninth inning, but one he held out of necessity due to the vast number of injuries that affected the bullpen early on. He earned 14 saves before the injured Rays relievers got healthy and Tampa Bay surprisingly traded him to Seattle. Castillo logged only two saves in six chances with the Mariners as the third option in their closer committee, but he posted a solid 2.78 ERA and 0.98 WHIP for the season with a career best 32.2% strikeout rate and 7.3% walk rate. His velocity dropped a few ticks to 94.7-mph and he allowed a career worst 1.4 HR/9, but there's still plenty to like in his profile. Castillo will likely get some save chances, but the likelihood of surpassing the 16 saves he logged last season are slim, as Seattle like to use a committee and has a tall high-leverage ladder.
Rays relievers are typically more useful in formats that give some value to bullpen arms beyond just saves, as 12 different Rays picked up a save last season. Castillo was one of the more valuable members of that group regardless of format, as he finished second on the team with four saves while posting a 1.66 ERA in 21.2 innings. His underlying numbers don't back up that level of dominance, as it took a .176 BABIP and an unsustainable 100% strand rate to get him there. His 4.53 FIP, which factors in a decent 25.8 K% and a poor 12.4 BB%, both career worsts, paints a considerably less impressive picture. Small-sample caveats apply to both his ERA and FIP, however, and finishing with a mark in the realm of his 3.30 ERA and 3.53 FIP from his first two years wouldn't be a surprise. That would leave him shy of typical closer material, though the Rays' usage patterns probably mean he'll still get some saves.
Castillo proved to be a jack-of-all-trades for the Rays in 2019, working as both a setup man and closer -- finishing with 17 holds and eight saves -- while also starting six games as an opener. He was dialed in for the first two months of the season before struggling in June and subsequently landing on the injured list with a shoulder issue. Castillo returned after the All-Star break and showed no ill effects, posting a 2.88 ERA and 1.17 WHIP over 34.1 second-half innings with a 43:10 K:BB and 0.8 HR/9 over that stretch. His skill set, which includes a fastball that touches triple digits with a swing-and-miss slider, is reminiscent of a closer; while Emilio Pagan was traded, the Rays used a committee at times and could do so again in 2020 as they still have a plethora of viable endgame options. Either way, Castillo should see high-leverage work and is a good bet to see at least some save chances.
Castillo posted strong numbers in his debut campaign, recording a 3.18 ERA backed up by a strong 29.3% strikeout rate. He technically logged 11 starts, though all came firmly in the "opener" role, as none lasted more than two innings. With a 98-mph fastball, an 89-mph slider and a strong minor-league track record, Castillo's performance looks legitimate and repeatable. He has the skill set to eventually get a look in the closer role. The team may prefer his flexibility and willingness to work in the opener role for the time being. The job exposes him to the toughest part of the opposing order more often and hurts his chances for wins, but also gives him to a larger workload than is typical for a reliever -- he worked 1.3 innings per outing last season -- which helps him rack up more strikeouts.
More Fantasy News
Recalled to Minnesota
PMinnesota Twins  AAA
September 28, 2024
The Twins recalled Castillo from Triple-A St. Paul on Saturday.
ANALYSIS
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Sent down to Triple-A
PMinnesota Twins  AAA
September 4, 2024
The Twins optioned Castillo to Triple-A St. Paul on Wednesday.
ANALYSIS
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Moves up to majors
PMinnesota Twins  AAA
September 1, 2024
The Twins selected Castillo's contract from Triple-A St. Paul on Sunday.
ANALYSIS
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Re-signs with Twins
PMinnesota Twins  AAA
July 4, 2024
Castillo signed a minor-league contract with the Twins on Wednesday.
ANALYSIS
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Becomes free agent
PFree Agent  AAA
June 17, 2024
Castillo elected free agency Sunday.
ANALYSIS
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Latest Fantasy Rumors
Has improved mental game
PMinnesota Twins  AAA
May 31, 2024
Castillo said Tuesday his decrease in walks early this season is due to mental changes that have helped him to better visualize where he's throwing the ball, per Do-Hyoung Park of MLB.com.
ANALYSIS
The 30-year-old spent most of last season at the Triple-A level with the Mariners and had a 5.32 ERA and 50:35 K:BB over 47.1 innings, but he excelled at Triple-A St. Paul this year after joining the Twins on a minor-league deal. Castillo, who had his contract selected Tuesday, made 18 appearances for St. Paul and posted a 2.50 ERA, 1.06 WHIP and 22:6 K:BB over 18 innings. The right-hander tallied 23 saves and 19 holds with Tampa Bay and Seattle in 2021 and 2022, and he could work his way into the high-leverage mix for Minnesota if he's able to keep up the strong form.
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