Reid Kristien Detmers (born July 8, 1999) is an American professional baseball pitcher for the Los Angeles Angels of Major League Baseball (MLB).
Detmers was born in Nokomis, Illinois and attended Nokomis High School as well as Glenwood High School, lettering in baseball for four seasons between the two schools. He played college baseball at the University of Louisville for three seasons, earning Atlantic Coast Conference and national accolades by his second season. By his junior year, Detmers was considered one of the top prospects for the MLB draft. He was selected tenth overall by the Angels in the first round of the 2020 draft and signed with the team, forgoing his final year of college eligibility.

Trophies 
Milestones
Former Youth Teams 
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| SO/BB | MLB | 2025 | 3.20 |
| SO9 | MLB | 2025 | 11.3 |
| BB9 | MLB | 2025 | 3.5 |
| HR9 | MLB | 2025 | 0.8 |
| H9 | MLB | 2025 | 8.2 |
| WHIP | MLB | 2025 | 1.304 |
| Fielding Independent Pitching | MLB | 2025 | 3.12 |
| ERA+ | MLB | 2025 | 108 |
| Batters Faced | MLB | 2025 | 266 |
| Wild Pitches | MLB | 2025 | 2 |
| Balks | MLB | 2025 | 0 |
| Times Hit by a Pitch | MLB | 2025 | 2 |
| Strikeouts | MLB | 2025 | 80 |
| Intentional Bases on Balls | MLB | 2025 | 4 |
| Bases on Balls/Walks | MLB | 2025 | 25 |
| Home Runs Allowed | MLB | 2025 | 6 |
| Earned Runs Allowed | MLB | 2025 | 28 |
| Runs Allowed | MLB | 2025 | 29 |
| Hits Allowed | MLB | 2025 | 58 |
| Innings Pitched | MLB | 2025 | 63.2 |
| Saves | MLB | 2025 | 3 |
| Shutouts | MLB | 2025 | 0 |
| Complete Games | MLB | 2025 | 0 |
| Games Finished | MLB | 2025 | 7 |
| Games Started | MLB | 2025 | 0 |
| Games Pitched | MLB | 2025 | 61 |
| ERA | MLB | 2025 | 3.96 |
| Win-Loss Percentage | MLB | 2025 | .625 |
| Loss | MLB | 2025 | 3 |
| Wins | MLB | 2025 | 5 |
| Wins Above Replacement for Pitchers | MLB | 2025 | 1.3 |
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|
| SO/BB | MLB | 2024 | 2.87 |
| SO9 | MLB | 2024 | 11.2 |
| BB9 | MLB | 2024 | 3.9 |
| HR9 | MLB | 2024 | 1.9 |
| H9 | MLB | 2024 | 10.1 |
| WHIP | MLB | 2024 | 1.557 |
| Fielding Independent Pitching | MLB | 2024 | 4.72 |
| ERA+ | MLB | 2024 | 63 |
| Batters Faced | MLB | 2024 | 391 |
| Wild Pitches | MLB | 2024 | 4 |
| Balks | MLB | 2024 | 0 |
| Times Hit by a Pitch | MLB | 2024 | 2 |
| Strikeouts | MLB | 2024 | 109 |
| Intentional Bases on Balls | MLB | 2024 | 0 |
| Bases on Balls/Walks | MLB | 2024 | 38 |
| Home Runs Allowed | MLB | 2024 | 18 |
| Earned Runs Allowed | MLB | 2024 | 65 |
| Runs Allowed | MLB | 2024 | 67 |
| Hits Allowed | MLB | 2024 | 98 |
| Innings Pitched | MLB | 2024 | 87.1 |
| Saves | MLB | 2024 | 0 |
| Shutouts | MLB | 2024 | 0 |
| Complete Games | MLB | 2024 | 0 |
| Games Finished | MLB | 2024 | 0 |
| Games Started | MLB | 2024 | 17 |
| Games Pitched | MLB | 2024 | 17 |
| ERA | MLB | 2024 | 6.70 |
| Win-Loss Percentage | MLB | 2024 | .308 |
| Loss | MLB | 2024 | 9 |
| Wins | MLB | 2024 | 4 |
| Wins Above Replacement for Pitchers | MLB | 2024 | -1.1 |
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|
| SO/BB | MLB | 2023 | 2.80 |
| SO9 | MLB | 2023 | 10.2 |
| BB9 | MLB | 2023 | 3.6 |
| HR9 | MLB | 2023 | 1.2 |
| H9 | MLB | 2023 | 8.5 |
| WHIP | MLB | 2023 | 1.352 |
| Fielding Independent Pitching | MLB | 2023 | 4.13 |
| ERA+ | MLB | 2023 | 100 |
| Batters Faced | MLB | 2023 | 644 |
| Wild Pitches | MLB | 2023 | 7 |
| Balks | MLB | 2023 | 0 |
| Times Hit by a Pitch | MLB | 2023 | 13 |
| Strikeouts | MLB | 2023 | 168 |
| Intentional Bases on Balls | MLB | 2023 | 2 |
| Bases on Balls/Walks | MLB | 2023 | 60 |
| Home Runs Allowed | MLB | 2023 | 19 |
| Earned Runs Allowed | MLB | 2023 | 74 |
| Runs Allowed | MLB | 2023 | 81 |
| Hits Allowed | MLB | 2023 | 141 |
| Innings Pitched | MLB | 2023 | 148.2 |
| Saves | MLB | 2023 | 0 |
| Shutouts | MLB | 2023 | 0 |
| Complete Games | MLB | 2023 | 0 |
| Games Finished | MLB | 2023 | 0 |
| Games Started | MLB | 2023 | 28 |
| Games Pitched | MLB | 2023 | 28 |
| ERA | MLB | 2023 | 4.48 |
| Win-Loss Percentage | MLB | 2023 | .286 |
| Loss | MLB | 2023 | 10 |
| Wins | MLB | 2023 | 4 |
| Wins Above Replacement for Pitchers | MLB | 2023 | 2.2 |
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|
| SO/BB | MLB | 2022 | 2.65 |
| SO9 | MLB | 2022 | 8.5 |
| BB9 | MLB | 2022 | 3.2 |
| HR9 | MLB | 2022 | 0.9 |
| H9 | MLB | 2022 | 7.7 |
| WHIP | MLB | 2022 | 1.209 |
| Fielding Independent Pitching | MLB | 2022 | 3.79 |
| ERA+ | MLB | 2022 | 106 |
| Batters Faced | MLB | 2022 | 539 |
| Wild Pitches | MLB | 2022 | 2 |
| Balks | MLB | 2022 | 0 |
| Times Hit by a Pitch | MLB | 2022 | 8 |
| Strikeouts | MLB | 2022 | 122 |
| Intentional Bases on Balls | MLB | 2022 | 1 |
| Bases on Balls/Walks | MLB | 2022 | 46 |
| Home Runs Allowed | MLB | 2022 | 13 |
| Earned Runs Allowed | MLB | 2022 | 54 |
| Runs Allowed | MLB | 2022 | 56 |
| Hits Allowed | MLB | 2022 | 110 |
| Innings Pitched | MLB | 2022 | 129.0 |
| Saves | MLB | 2022 | 0 |
| Shutouts | MLB | 2022 | 1 |
| Complete Games | MLB | 2022 | 1 |
| Games Finished | MLB | 2022 | 0 |
| Games Started | MLB | 2022 | 25 |
| Games Pitched | MLB | 2022 | 25 |
| ERA | MLB | 2022 | 3.77 |
| Win-Loss Percentage | MLB | 2022 | .538 |
| Loss | MLB | 2022 | 6 |
| Wins | MLB | 2022 | 7 |
| Wins Above Replacement for Pitchers | MLB | 2022 | 2.4 |
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|
| SO/BB | MLB | 2021 | 1.73 |
| SO9 | MLB | 2021 | 8.3 |
| BB9 | MLB | 2021 | 4.8 |
| HR9 | MLB | 2021 | 2.2 |
| H9 | MLB | 2021 | 11.3 |
| WHIP | MLB | 2021 | 1.790 |
| Fielding Independent Pitching | MLB | 2021 | 6.36 |
| ERA+ | MLB | 2021 | 61 |
| Batters Faced | MLB | 2021 | 101 |
| Wild Pitches | MLB | 2021 | 1 |
| Balks | MLB | 2021 | 0 |
| Home Runs Allowed | MLB | 2021 | 5 |
| Earned Runs Allowed | MLB | 2021 | 17 |
| Runs Allowed | MLB | 2021 | 17 |
| Hits Allowed | MLB | 2021 | 26 |
| Innings Pitched | MLB | 2021 | 20.2 |
| Saves | MLB | 2021 | 0 |
| Shutouts | MLB | 2021 | 0 |
| Complete Games | MLB | 2021 | 0 |
| Games Finished | MLB | 2021 | 0 |
| Games Started | MLB | 2021 | 5 |
| Games Pitched | MLB | 2021 | 5 |
| ERA | MLB | 2021 | 7.40 |
| Win-Loss Percentage | MLB | 2021 | .250 |
| Loss | MLB | 2021 | 3 |
| Wins | MLB | 2021 | 1 |
| Wins Above Replacement for Pitchers | MLB | 2021 | -0.2 |
| 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 |
| Rbat+ | MLB | 2021 | 117 |
| rOBA | MLB | 2021 | .346 |
| OPS+ | MLB | 2021 | 56 |
| OPS | MLB | 2021 | .500 |
| SLG | MLB | 2021 | .000 |
| OBP | MLB | 2021 | .500 |
| Hits/At Bats | MLB | 2021 | .000 |
| Strikeouts | MLB | 2021 | 1 |
| Bases on Balls/Walks | MLB | 2021 | 1 |
| 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 | 1 |
| Plate Appearances | MLB | 2021 | 2 |
| Games Played | MLB | 2021 | 1 |
| Wins Above Replacement for position players | MLB | 2021 | 0.0 |
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