Diego Castillo
Diego Castillo
25-Year-Old PitcherRP
Tampa Bay Rays
2019 Fantasy Outlook
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. Read Past Outlooks
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Effective since IL return
PTampa Bay Rays
July 20, 2019
Castillo, who fired a scoreless inning during which he allowed one hit and recorded two strikeouts in a loss to the White Sox on Friday, has logged 3.1 scoreless frames over three appearances since his return from the injured list.
Castillo has also notched a hold and five strikeouts over that span, certainly encouraging after he surrendered six earned runs over 1.2 innings across his final two appearances before hitting the IL with shoulder inflammation. The 25-year-old's struggles may have well been due to his worsening physical issues, with his aforementioned trio of appearances since returning lending credence to that notion. Although he's yet to see a save chance since his return, Castillo should be in line for a fair share of them with Jose Alvarado (oblique) still projected to be out for multiple weeks.
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Pitching Stats
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Minor League Game Log
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Left/Right Pitching Splits
Since 2017
No Stats
BAA Batters K BB H 2B 3B HR
Since 2017vs Left .194 153 44 19 26 1 0 4
Since 2017vs Right .201 232 64 16 42 10 1 7
2019vs Left .269 60 15 8 14 0 0 1
2019vs Right .202 103 28 9 18 4 1 4
2018vs Left .146 93 29 11 12 1 0 3
2018vs Right .200 129 36 7 24 6 0 3
2017vs Left 0 0 0 0 0 0 0 0
2017vs Right 0 0 0 0 0 0 0 0
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Home/Away Pitching Splits
Since 2017
ERA at Home
ERA at Home
Even Split
No Stats
Since 2017Home 3.29 1.06 54.2 4 5 4 10.2 3.0 1.0
Since 2017Away 3.32 1.11 40.2 1 3 3 10.2 3.8 1.1
2019Home 3.48 1.16 20.2 1 3 4 9.1 2.2 1.3
2019Away 3.50 1.39 18.0 0 3 3 11.0 6.0 1.0
2018Home 3.18 1.00 34.0 3 2 0 10.9 3.4 0.8
2018Away 3.18 0.88 22.2 1 0 0 9.5 2.0 1.2
2017Home 0 0 0 0 0 0 0 0 0
2017Away 0 0 0 0 0 0 0 0 0
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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 this season's data (min 20 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.
    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.
98.3 mph
Left On Base
Exit Velocity
88.2 mph
Spin Rate
2205 rpm
Balls Hit 95+ MPH
Swinging Strike
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
AL FAAB Factor: Waiver Pickups of the Week
7 days ago
Erik Siegrist sifts through a pitching-rich waiver wire in the American League and notes a number of players getting ready to return from the IL, including Rangers outfielder Hunter Pence.
Mound Musings: The Futures Game Showcase
10 days ago
Brad Johnson examines some of the impact players in the Futures Game who he thinks should be on fantasy watch lists, like the Braves Ian Anderson.
AL FAAB Factor: Waiver Pickups of the Week
21 days ago
Erik Siegrist looks over the free-agent pool in the American League and thinks Brendan McKay is ready to make a big impact in the Tampa Bay rotation.
Mound Musings: Potential Second Half Success Stories
24 days ago
Brad Johnson examines pitchers who are candidates to improve significantly in the second half like Aaron Nola, who Johnson anticipates will soon be on a roll.
Regan's Rumblings: Trade Deadline Bullpen Shuffle
26 days ago
Dave Regan breaks down the bullpen trade candidates, including Will Smith of the San Francisco Giants.
More Fantasy News
Officially activated
PTampa Bay Rays
July 11, 2019
Castillo (shoulder) was activated from the 10-day injured list Thursday.
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Expects to return Friday
PTampa Bay Rays
July 11, 2019
Castillo (shoulder) expects to return from the injured list prior to Friday's game against the Orioles, Josh Tolentino of The Athletic reports.
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Solid in first rehab appearance
PTampa Bay Rays
July 10, 2019
Castillo (shoulder) fired a scoreless third inning during which he issued a walk and recorded a strikeout in the Gulf Coast League Rays' loss to the GCL Red Sox on Tuesday.
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Begins rehab assignment
PTampa Bay Rays
July 9, 2019
Castillo (shoulder) began a rehab assignment with the Rays' Gulf Coast League affiliate on Tuesday, Neil Solondz of the Rays Radio Network reports.
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Throws live BP
PTampa Bay Rays
July 6, 2019
Castillo (shoulder) threw a 15-pitch live batting practice session Saturday, Marc Topkin of the Tampa Bay Times reports.
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