Diego Castillo

Diego Castillo

29-Year-Old PitcherRP
Seattle Mariners
2023 Fantasy Outlook
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. Read Past Outlooks
RANKS
#575
ADP
$Signed a one-year contract with the Mariners in March of 2022.
Takes third loss Wednesday
PSeattle Mariners
September 8, 2022
Castillo (7-3) was charged with the loss against the White Sox on Wednesday, allowing an unearned run on one hit over one inning while recording a strikeout.
ANALYSIS
Castillo was sharp and efficient while throwing 10 of 15 pitches for strikes, but the RBI groundout he surrendered to Gavin Sheets in the eighth inning snapped a 6-6 tie and gave the White Sox a lead they wouldn't relinquish. The veteran right-hander has now uncharacteristically allowed a run in three straight appearances, but he still sports a solid 3.50 ERA and 1.21 WHIP in addition to his seven victories, seven holds and six saves.
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Pitching Stats
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2022
2021
2020
2019
2018
2022 MLB Game Log
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2021 MLB Game Log
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2020 MLB Game Log
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2019 MLB Game Log
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2018 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
14
Last 10 Games
10
Last 5 Games
11
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 2020
 
 
-13%
BAA vs RHP
2022
 
 
-26%
BAA vs RHP
2021
 
 
-6%
BAA vs RHP
2020
 
 
-20%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2020vs Left .211 193 40 27 34 5 0 8
Since 2020vs Right .183 349 111 23 58 8 0 9
2022vs Left .243 81 14 11 17 3 0 2
2022vs Right .181 141 39 11 23 1 0 3
2021vs Left .203 84 20 11 14 1 0 6
2021vs Right .190 149 55 6 26 5 0 3
2020vs Left .136 28 6 5 3 1 0 0
2020vs Right .170 59 17 6 9 2 0 3
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2020
 
 
-16%
ERA on Road
2022
 
 
-56%
ERA on Road
2021
 
 
-43%
ERA at Home
2020
 
 
-3%
ERA on Road
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2020Home 3.21 1.04 67.1 7 4 12 9.9 2.7 1.3
Since 2020Away 2.69 1.07 67.0 8 4 15 10.3 4.0 0.9
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
2021Home 1.98 0.88 27.1 3 2 8 11.9 2.3 1.3
2021Away 3.48 1.06 31.0 2 3 8 11.3 2.9 1.5
2020Home 1.69 0.94 10.2 1 0 2 10.1 4.2 0.8
2020Away 1.64 1.18 11.0 2 0 2 9.0 4.9 1.6
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
2.41
 
K/9
8.8
 
BB/9
3.6
 
HR/9
0.8
 
Fastball
95.3 mph
 
ERA
3.64
 
WHIP
1.14
 
BABIP
.259
 
GB/FB
1.39
 
Left On Base
63.6%
 
Exit Velocity
81.1 mph
 
Barrels/BBE
4.1%
 
Spin Rate
2155 rpm
 
Balls Hit 95+ MPH
20.2%
 
Swinging Strike
12.2%
 
Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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Recent RotoWire Articles Featuring Diego Castillo See More
Todd's Takes: Wrapping Up Last Year's Moves
12 days ago
Todd Zola tackles another large set of offseason moves, including big names like Carlos Rodon as well as several players to consider late in drafts.
The Z Files: OK, I'm SOLD
59 days ago
Todd Zola reconsiders his stance against adding holds as a roto category, and takes a look at the impact it would have on relievers like Devin Williams.
Past Fantasy Outlooks
2022
2021
2020
2019
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
Grabs fifth hold in return
PSeattle Mariners
August 11, 2022
Castillo, activated from the injured list earlier in the day, recorded his fifth hold in a win over the Yankees on Wednesday, firing a perfect eighth inning during which he recorded a strikeout.
ANALYSIS
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Makes return from IL
PSeattle Mariners
August 10, 2022
The Mariners reinstated Castillo (shoulder) from the 15-day injured list Wednesday.
ANALYSIS
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Heading out on rehab assignment
PSeattle Mariners
Shoulder
August 8, 2022
Castillo (shoulder) is set to begin a rehab assignment in coming days with High-A Everett, Daniel Kramer of MLB.com reports.
ANALYSIS
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Likely to return after 15 days
PSeattle Mariners
Shoulder
July 28, 2022
Manager Scott Servais said Thursday that he expects Castillo (shoulder) to return after missing the minimum of 15 days, Shannon Drayer of 710 ESPN Seattle reports.
ANALYSIS
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Placed on injured list
PSeattle Mariners
Shoulder
July 28, 2022
Castillo was placed on the 15-day injured list with right shoulder inflammation Thursday, retroactive to July 26.
ANALYSIS
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