Diego Castillo (born January 18, 1994) is a Dominican professional baseball pitcher for the Tacoma Rainiers, in the Seattle Mariners organization. He previously played in MLB for the Tampa Bay Rays.
Castillo signed with the Tampa Bay Rays as an international free agent in March 2014. He made his professional debut that season with the Dominican Summer League Rays and spent the whole season there, going 3-3 with a 3.96 ERA in 25 innings. In 2015, he played for both the Hudson Valley Renegades and Bowling Green Hot Rods, compiling a combined 1-2 record and 3.03 ERA in 18 relief appearances.
Trophies 
Milestones
Former Youth Teams
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| SO/BB | MLB | 2024 | 0.75 |
| SO9 | MLB | 2024 | 5.4 |
| BB9 | MLB | 2024 | 7.2 |
| HR9 | MLB | 2024 | 0.0 |
| H9 | MLB | 2024 | 7.2 |
| WHIP | MLB | 2024 | 1.600 |
| Fielding Independent Pitching | MLB | 2024 | 4.37 |
| ERA+ | MLB | 2024 | 161 |
| Batters Faced | MLB | 2024 | 43 |
| Wild Pitches | MLB | 2024 | 1 |
| Balks | MLB | 2024 | 0 |
| Home Runs Allowed | MLB | 2024 | 0 |
| Earned Runs Allowed | MLB | 2024 | 3 |
| Runs Allowed | MLB | 2024 | 3 |
| Hits Allowed | MLB | 2024 | 8 |
| Innings Pitched | MLB | 2024 | 10.0 |
| Saves | MLB | 2024 | 0 |
| Shutouts | MLB | 2024 | 0 |
| Complete Games | MLB | 2024 | 0 |
| Games Finished | MLB | 2024 | 3 |
| Games Started | MLB | 2024 | 0 |
| Games Pitched | MLB | 2024 | 7 |
| ERA | MLB | 2024 | 2.70 |
| Loss | MLB | 2024 | 0 |
| Wins | MLB | 2024 | 0 |
| Wins Above Replacement for Pitchers | MLB | 2024 | 0.2 |
| Positions Played | MLB | 2024 | /5DH |
| Intentional Bases on Balls | MLB | 2024 | 0 |
| Sacrifice Flies | MLB | 2024 | 0 |
| Sacrifice Hits | MLB | 2024 | 0 |
| Times Hit by a Pitch | MLB | 2024 | 0 |
| GIDP | MLB | 2024 | 0 |
| Total Bases | MLB | 2024 | 3 |
| Rbat+ | MLB | 2024 | 189 |
| rOBA | MLB | 2024 | .439 |
| OPS+ | MLB | 2024 | 185 |
| OPS | MLB | 2024 | 1.000 |
| SLG | MLB | 2024 | .500 |
| OBP | MLB | 2024 | .500 |
| Hits/At Bats | MLB | 2024 | .333 |
| Strikeouts | MLB | 2024 | 1 |
| Bases on Balls/Walks | MLB | 2024 | 2 |
| Caught Stealing | MLB | 2024 | 0 |
| Stolen Bases | MLB | 2024 | 0 |
| Runs Batted In | MLB | 2024 | 2 |
| Home Runs | MLB | 2024 | 0 |
| Triples | MLB | 2024 | 0 |
| Doubles | MLB | 2024 | 1 |
| Hits | MLB | 2024 | 2 |
| Runs Scored | MLB | 2024 | 3 |
| At Bats | MLB | 2024 | 6 |
| Plate Appearances | MLB | 2024 | 8 |
| Games Played | MLB | 2024 | 4 |
| Wins Above Replacement for position players | MLB | 2024 | 0.2 |
|
|
| SO/BB | MLB | 2023 | 1.00 |
| SO9 | MLB | 2023 | 7.3 |
| BB9 | MLB | 2023 | 7.3 |
| HR9 | MLB | 2023 | 2.1 |
| H9 | MLB | 2023 | 7.3 |
| WHIP | MLB | 2023 | 1.615 |
| Fielding Independent Pitching | MLB | 2023 | 7.41 |
| ERA+ | MLB | 2023 | 66 |
| Batters Faced | MLB | 2023 | 41 |
| Wild Pitches | MLB | 2023 | 0 |
| Balks | MLB | 2023 | 0 |
| Home Runs Allowed | MLB | 2023 | 2 |
| Earned Runs Allowed | MLB | 2023 | 6 |
| Runs Allowed | MLB | 2023 | 6 |
| Hits Allowed | MLB | 2023 | 7 |
| Innings Pitched | MLB | 2023 | 8.2 |
| Saves | MLB | 2023 | 0 |
| Shutouts | MLB | 2023 | 0 |
| Complete Games | MLB | 2023 | 0 |
| Games Finished | MLB | 2023 | 1 |
| Games Started | MLB | 2023 | 0 |
| Games Pitched | MLB | 2023 | 8 |
| ERA | MLB | 2023 | 6.23 |
| Loss | MLB | 2023 | 0 |
| Wins | MLB | 2023 | 0 |
| Wins Above Replacement for Pitchers | MLB | 2023 | -0.2 |
| Positions Played | MLB | 2023 | /H |
| Intentional Bases on Balls | MLB | 2023 | 0 |
| Sacrifice Flies | MLB | 2023 | 0 |
| Sacrifice Hits | MLB | 2023 | 0 |
| Times Hit by a Pitch | MLB | 2023 | 0 |
| GIDP | MLB | 2023 | 0 |
| Total Bases | MLB | 2023 | 0 |
| Rbat+ | MLB | 2023 | -133 |
| rOBA | MLB | 2023 | .000 |
| OPS+ | MLB | 2023 | -100 |
| OPS | MLB | 2023 | .000 |
| SLG | MLB | 2023 | .000 |
| OBP | MLB | 2023 | .000 |
| Hits/At Bats | MLB | 2023 | .000 |
| Strikeouts | MLB | 2023 | 0 |
| Bases on Balls/Walks | MLB | 2023 | 0 |
| Caught Stealing | MLB | 2023 | 0 |
| Stolen Bases | MLB | 2023 | 0 |
| Runs Batted In | MLB | 2023 | 0 |
| Home Runs | MLB | 2023 | 0 |
| Triples | MLB | 2023 | 0 |
| Doubles | MLB | 2023 | 0 |
| Hits | MLB | 2023 | 0 |
| Runs Scored | MLB | 2023 | 0 |
| At Bats | MLB | 2023 | 1 |
| Plate Appearances | MLB | 2023 | 1 |
| Games Played | MLB | 2023 | 1 |
| Wins Above Replacement for position players | MLB | 2023 | 0.0 |
|
|
| SO/BB | MLB | 2022 | 2.41 |
| SO9 | MLB | 2022 | 8.8 |
| BB9 | MLB | 2022 | 3.6 |
| HR9 | MLB | 2022 | 0.8 |
| H9 | MLB | 2022 | 6.6 |
| WHIP | MLB | 2022 | 1.141 |
| Fielding Independent Pitching | MLB | 2022 | 3.68 |
| ERA+ | MLB | 2022 | 102 |
| Batters Faced | MLB | 2022 | 222 |
| Wild Pitches | MLB | 2022 | 1 |
| Balks | MLB | 2022 | 0 |
| Home Runs Allowed | MLB | 2022 | 5 |
| Earned Runs Allowed | MLB | 2022 | 22 |
| Runs Allowed | MLB | 2022 | 27 |
| Hits Allowed | MLB | 2022 | 40 |
| Innings Pitched | MLB | 2022 | 54.1 |
| Saves | MLB | 2022 | 7 |
| Shutouts | MLB | 2022 | 0 |
| Complete Games | MLB | 2022 | 0 |
| Games Finished | MLB | 2022 | 23 |
| Games Started | MLB | 2022 | 0 |
| Games Pitched | MLB | 2022 | 59 |
| ERA | MLB | 2022 | 3.64 |
| Win-Loss Percentage | MLB | 2022 | .700 |
| Loss | MLB | 2022 | 3 |
| Wins | MLB | 2022 | 7 |
| Wins Above Replacement for Pitchers | MLB | 2022 | 0.0 |
| Positions Played | MLB | 2022 | 649H/351D |
| Intentional Bases on Balls | MLB | 2022 | 1 |
| Sacrifice Flies | MLB | 2022 | 4 |
| Sacrifice Hits | MLB | 2022 | 0 |
| Times Hit by a Pitch | MLB | 2022 | 3 |
| GIDP | MLB | 2022 | 7 |
| Total Bases | MLB | 2022 | 100 |
| Rbat+ | MLB | 2022 | 80 |
| rOBA | MLB | 2022 | .287 |
| OPS+ | MLB | 2022 | 77 |
| OPS | MLB | 2022 | .633 |
| SLG | MLB | 2022 | .382 |
| OBP | MLB | 2022 | .251 |
| Hits/At Bats | MLB | 2022 | .206 |
| Strikeouts | MLB | 2022 | 75 |
| Bases on Balls/Walks | MLB | 2022 | 14 |
| Caught Stealing | MLB | 2022 | 1 |
| Stolen Bases | MLB | 2022 | 1 |
| Runs Batted In | MLB | 2022 | 29 |
| Home Runs | MLB | 2022 | 11 |
| Triples | MLB | 2022 | 0 |
| Doubles | MLB | 2022 | 13 |
| Hits | MLB | 2022 | 54 |
| Runs Scored | MLB | 2022 | 28 |
| At Bats | MLB | 2022 | 262 |
| Plate Appearances | MLB | 2022 | 283 |
| Games Played | MLB | 2022 | 96 |
| Wins Above Replacement for position players | MLB | 2022 | -0.7 |
|
|
| SO/BB | MLB | 2021 | 4.90 |
| SO9 | MLB | 2021 | 12.1 |
| BB9 | MLB | 2021 | 2.5 |
| HR9 | MLB | 2021 | 1.2 |
| H9 | MLB | 2021 | 6.4 |
| WHIP | MLB | 2021 | 0.991 |
| Fielding Independent Pitching | MLB | 2021 | 3.17 |
| ERA+ | MLB | 2021 | 149 |
| Batters Faced | MLB | 2021 | 145 |
| Wild Pitches | MLB | 2021 | 1 |
| Balks | MLB | 2021 | 0 |
| Home Runs Allowed | MLB | 2021 | 5 |
| Earned Runs Allowed | MLB | 2021 | 11 |
| Runs Allowed | MLB | 2021 | 14 |
| Hits Allowed | MLB | 2021 | 26 |
| Innings Pitched | MLB | 2021 | 36.1 |
| Saves | MLB | 2021 | 14 |
| Shutouts | MLB | 2021 | 0 |
| Complete Games | MLB | 2021 | 0 |
| Games Finished | MLB | 2021 | 26 |
| Games Started | MLB | 2021 | 0 |
| Games Pitched | MLB | 2021 | 37 |
| ERA | MLB | 2021 | 2.72 |
| Win-Loss Percentage | MLB | 2021 | .333 |
| Loss | MLB | 2021 | 4 |
| Wins | MLB | 2021 | 2 |
| Wins Above Replacement for Pitchers | MLB | 2021 | 0.8 |
| Positions Played | MLB | 2021 | 1 |
| Intentional Bases on Balls | MLB | 2021 | 0 |
| Sacrifice Flies | MLB | 2021 | 0 |
| Sacrifice Hits | MLB | 2021 | 0 |
| Times Hit by a Pitch | MLB | 2021 | 0 |
| GIDP | MLB | 2021 | 0 |
| Total Bases | MLB | 2021 | 0 |
| Strikeouts | MLB | 2021 | 0 |
| Bases on Balls/Walks | MLB | 2021 | 0 |
| Caught Stealing | MLB | 2021 | 0 |
| Stolen Bases | MLB | 2021 | 0 |
| Runs Batted In | MLB | 2021 | 0 |
| Home Runs | MLB | 2021 | 0 |
| Triples | MLB | 2021 | 0 |
| Doubles | MLB | 2021 | 0 |
| Hits | MLB | 2021 | 0 |
| Runs Scored | MLB | 2021 | 0 |
| At Bats | MLB | 2021 | 0 |
| Plate Appearances | MLB | 2021 | 0 |
| Games Played | MLB | 2021 | 3 |
| Wins Above Replacement for position players | MLB | 2021 | 0.0 |
|
|
| SO/BB | MLB | 2020 | 2.09 |
| SO9 | MLB | 2020 | 9.6 |
| BB9 | MLB | 2020 | 4.6 |
| HR9 | MLB | 2020 | 1.2 |
| H9 | MLB | 2020 | 5.0 |
| WHIP | MLB | 2020 | 1.062 |
| Fielding Independent Pitching | MLB | 2020 | 4.53 |
| ERA+ | MLB | 2020 | 249 |
| Batters Faced | MLB | 2020 | 89 |
| Wild Pitches | MLB | 2020 | 0 |
| Balks | MLB | 2020 | 0 |
| Times Hit by a Pitch | MLB | 2020 | 1 |
| Strikeouts | MLB | 2020 | 23 |
| Intentional Bases on Balls | MLB | 2020 | 0 |
| Bases on Balls/Walks | MLB | 2020 | 11 |
| Home Runs Allowed | MLB | 2020 | 3 |
| Earned Runs Allowed | MLB | 2020 | 4 |
| Runs Allowed | MLB | 2020 | 4 |
| Hits Allowed | MLB | 2020 | 12 |
| Innings Pitched | MLB | 2020 | 21.2 |
| Saves | MLB | 2020 | 4 |
| Shutouts | MLB | 2020 | 0 |
| Complete Games | MLB | 2020 | 0 |
| Games Finished | MLB | 2020 | 5 |
| Games Started | MLB | 2020 | 0 |
| Games Pitched | MLB | 2020 | 22 |
| ERA | MLB | 2020 | 1.66 |
| Win-Loss Percentage | MLB | 2020 | 1.000 |
| Loss | MLB | 2020 | 0 |
| Wins | MLB | 2020 | 3 |
| Wins Above Replacement for Pitchers | MLB | 2020 | 0.9 |
|
|
| SO/BB | MLB | 2019 | 3.12 |
| SO9 | MLB | 2019 | 10.6 |
| BB9 | MLB | 2019 | 3.4 |
| HR9 | MLB | 2019 | 1.0 |
| H9 | MLB | 2019 | 7.7 |
| WHIP | MLB | 2019 | 1.238 |
| Fielding Independent Pitching | MLB | 2019 | 3.72 |
| ERA+ | MLB | 2019 | 129 |
| Batters Faced | MLB | 2019 | 290 |
| Wild Pitches | MLB | 2019 | 5 |
| Balks | MLB | 2019 | 0 |
| Home Runs Allowed | MLB | 2019 | 8 |
| Earned Runs Allowed | MLB | 2019 | 26 |
| Runs Allowed | MLB | 2019 | 32 |
| Hits Allowed | MLB | 2019 | 59 |
| Innings Pitched | MLB | 2019 | 68.2 |
| Saves | MLB | 2019 | 8 |
| Shutouts | MLB | 2019 | 0 |
| Complete Games | MLB | 2019 | 0 |
| Games Finished | MLB | 2019 | 18 |
| Games Started | MLB | 2019 | 6 |
| Games Pitched | MLB | 2019 | 65 |
| ERA | MLB | 2019 | 3.41 |
| Win-Loss Percentage | MLB | 2019 | .385 |
| Loss | MLB | 2019 | 8 |
| Wins | MLB | 2019 | 5 |
| Wins Above Replacement for Pitchers | MLB | 2019 | 0.5 |
| Positions Played | MLB | 2019 | 1 |
| Intentional Bases on Balls | MLB | 2019 | 0 |
| Sacrifice Flies | MLB | 2019 | 0 |
| Sacrifice Hits | MLB | 2019 | 0 |
| Times Hit by a Pitch | MLB | 2019 | 0 |
| GIDP | MLB | 2019 | 0 |
| Total Bases | MLB | 2019 | 0 |
| Rbat+ | MLB | 2019 | -123 |
| rOBA | MLB | 2019 | .000 |
| OPS+ | MLB | 2019 | -100 |
| OPS | MLB | 2019 | .000 |
| SLG | MLB | 2019 | .000 |
| OBP | MLB | 2019 | .000 |
| Hits/At Bats | MLB | 2019 | .000 |
| Strikeouts | MLB | 2019 | 1 |
| Bases on Balls/Walks | MLB | 2019 | 0 |
| Caught Stealing | MLB | 2019 | 0 |
| Stolen Bases | MLB | 2019 | 0 |
| Runs Batted In | MLB | 2019 | 0 |
| Home Runs | MLB | 2019 | 0 |
| Triples | MLB | 2019 | 0 |
| Doubles | MLB | 2019 | 0 |
| Hits | MLB | 2019 | 0 |
| Runs Scored | MLB | 2019 | 0 |
| At Bats | MLB | 2019 | 1 |
| Plate Appearances | MLB | 2019 | 1 |
| Games Played | MLB | 2019 | 8 |
| Wins Above Replacement for position players | MLB | 2019 | 0.0 |
|
|
| SO/BB | MLB | 2018 | 3.61 |
| SO9 | MLB | 2018 | 10.3 |
| BB9 | MLB | 2018 | 2.9 |
| HR9 | MLB | 2018 | 1.0 |
| H9 | MLB | 2018 | 5.7 |
| WHIP | MLB | 2018 | 0.953 |
| Fielding Independent Pitching | MLB | 2018 | 3.30 |
| ERA+ | MLB | 2018 | 130 |
| Batters Faced | MLB | 2018 | 222 |
| Wild Pitches | MLB | 2018 | 5 |
| Balks | MLB | 2018 | 1 |
| Home Runs Allowed | MLB | 2018 | 6 |
| Earned Runs Allowed | MLB | 2018 | 20 |
| Runs Allowed | MLB | 2018 | 21 |
| Hits Allowed | MLB | 2018 | 36 |
| Innings Pitched | MLB | 2018 | 56.2 |
| Saves | MLB | 2018 | 0 |
| Shutouts | MLB | 2018 | 0 |
| Complete Games | MLB | 2018 | 0 |
| Games Finished | MLB | 2018 | 5 |
| Games Started | MLB | 2018 | 11 |
| Games Pitched | MLB | 2018 | 43 |
| ERA | MLB | 2018 | 3.18 |
| Win-Loss Percentage | MLB | 2018 | .667 |
| Loss | MLB | 2018 | 2 |
| Wins | MLB | 2018 | 4 |
| Wins Above Replacement for Pitchers | MLB | 2018 | 1.0 |
| Positions Played | MLB | 2018 | 1 |
| Intentional Bases on Balls | MLB | 2018 | 0 |
| Sacrifice Flies | MLB | 2018 | 0 |
| Sacrifice Hits | MLB | 2018 | 0 |
| Times Hit by a Pitch | MLB | 2018 | 0 |
| GIDP | MLB | 2018 | 0 |
| Total Bases | MLB | 2018 | 0 |
| Rbat+ | MLB | 2018 | -125 |
| rOBA | MLB | 2018 | .000 |
| OPS+ | MLB | 2018 | -100 |
| OPS | MLB | 2018 | .000 |
| SLG | MLB | 2018 | .000 |
| OBP | MLB | 2018 | .000 |
| Hits/At Bats | MLB | 2018 | .000 |
| Strikeouts | MLB | 2018 | 1 |
| Bases on Balls/Walks | MLB | 2018 | 0 |
| Caught Stealing | MLB | 2018 | 0 |
| Stolen Bases | MLB | 2018 | 0 |
| Runs Batted In | MLB | 2018 | 0 |
| Home Runs | MLB | 2018 | 0 |
| Triples | MLB | 2018 | 0 |
| Doubles | MLB | 2018 | 0 |
| Hits | MLB | 2018 | 0 |
| Runs Scored | MLB | 2018 | 0 |
| At Bats | MLB | 2018 | 1 |
| Plate Appearances | MLB | 2018 | 1 |
| Games Played | MLB | 2018 | 5 |
| Wins Above Replacement for position players | MLB | 2018 | 0.0 |
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Cabrera, Dominican Republic
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