Matthew Kevin Thaiss (born May 6, 1995) is an American professional baseball catcher for the Tampa Bay Rays of Major League Baseball (MLB). He has previously played in MLB for the Los Angeles Angels and Chicago White Sox. He made his MLB debut in 2019.

Trophies 
Milestones
Former Youth Teams 
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| Positions Played | MLB | 2025 | 2/H3D |
| Intentional Bases on Balls | MLB | 2025 | 0 |
| Sacrifice Flies | MLB | 2025 | 1 |
| Sacrifice Hits | MLB | 2025 | 0 |
| Times Hit by a Pitch | MLB | 2025 | 1 |
| GIDP | MLB | 2025 | 2 |
| Total Bases | MLB | 2025 | 25 |
| Rbat+ | MLB | 2025 | 108 |
| rOBA | MLB | 2025 | .323 |
| OPS+ | MLB | 2025 | 94 |
| OPS | MLB | 2025 | .676 |
| SLG | MLB | 2025 | .294 |
| OBP | MLB | 2025 | .382 |
| Hits/At Bats | MLB | 2025 | .212 |
| Strikeouts | MLB | 2025 | 21 |
| Bases on Balls/Walks | MLB | 2025 | 23 |
| Caught Stealing | MLB | 2025 | 1 |
| Stolen Bases | MLB | 2025 | 1 |
| Runs Batted In | MLB | 2025 | 8 |
| Home Runs | MLB | 2025 | 1 |
| Triples | MLB | 2025 | 0 |
| Doubles | MLB | 2025 | 4 |
| Hits | MLB | 2025 | 18 |
| Runs Scored | MLB | 2025 | 11 |
| At Bats | MLB | 2025 | 85 |
| Plate Appearances | MLB | 2025 | 110 |
| Games Played | MLB | 2025 | 35 |
| Wins Above Replacement for position players | MLB | 2025 | 1.1 |
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| Positions Played | MLB | 2024 | 2/DH |
| Intentional Bases on Balls | MLB | 2024 | 0 |
| Sacrifice Flies | MLB | 2024 | 1 |
| Sacrifice Hits | MLB | 2024 | 0 |
| Times Hit by a Pitch | MLB | 2024 | 0 |
| GIDP | MLB | 2024 | 2 |
| Total Bases | MLB | 2024 | 47 |
| Rbat+ | MLB | 2024 | 83 |
| rOBA | MLB | 2024 | .295 |
| OPS+ | MLB | 2024 | 78 |
| OPS | MLB | 2024 | .622 |
| SLG | MLB | 2024 | .299 |
| OBP | MLB | 2024 | .323 |
| Hits/At Bats | MLB | 2024 | .204 |
| Strikeouts | MLB | 2024 | 58 |
| Bases on Balls/Walks | MLB | 2024 | 28 |
| Caught Stealing | MLB | 2024 | 0 |
| Stolen Bases | MLB | 2024 | 3 |
| Runs Batted In | MLB | 2024 | 16 |
| Home Runs | MLB | 2024 | 2 |
| Triples | MLB | 2024 | 0 |
| Doubles | MLB | 2024 | 9 |
| Hits | MLB | 2024 | 32 |
| Runs Scored | MLB | 2024 | 14 |
| At Bats | MLB | 2024 | 157 |
| Plate Appearances | MLB | 2024 | 186 |
| Games Played | MLB | 2024 | 57 |
| Wins Above Replacement for position players | MLB | 2024 | 0.6 |
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| Positions Played | MLB | 2023 | 2H/D3 |
| Intentional Bases on Balls | MLB | 2023 | 1 |
| Sacrifice Flies | MLB | 2023 | 3 |
| Sacrifice Hits | MLB | 2023 | 0 |
| Times Hit by a Pitch | MLB | 2023 | 6 |
| GIDP | MLB | 2023 | 4 |
| Total Bases | MLB | 2023 | 89 |
| Rbat+ | MLB | 2023 | 84 |
| rOBA | MLB | 2023 | .302 |
| OPS+ | MLB | 2023 | 81 |
| OPS | MLB | 2023 | .659 |
| SLG | MLB | 2023 | .340 |
| OBP | MLB | 2023 | .319 |
| Hits/At Bats | MLB | 2023 | .214 |
| Strikeouts | MLB | 2023 | 83 |
| Bases on Balls/Walks | MLB | 2023 | 36 |
| Caught Stealing | MLB | 2023 | 0 |
| Stolen Bases | MLB | 2023 | 2 |
| Runs Batted In | MLB | 2023 | 31 |
| Home Runs | MLB | 2023 | 9 |
| Triples | MLB | 2023 | 0 |
| Doubles | MLB | 2023 | 6 |
| Hits | MLB | 2023 | 56 |
| Runs Scored | MLB | 2023 | 32 |
| At Bats | MLB | 2023 | 262 |
| Plate Appearances | MLB | 2023 | 307 |
| Games Played | MLB | 2023 | 95 |
| Wins Above Replacement for position players | MLB | 2023 | 0.4 |
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| Positions Played | MLB | 2022 | 23/H5 |
| Intentional Bases on Balls | MLB | 2022 | 1 |
| Sacrifice Flies | MLB | 2022 | 1 |
| Sacrifice Hits | MLB | 2022 | 0 |
| Times Hit by a Pitch | MLB | 2022 | 0 |
| GIDP | MLB | 2022 | 2 |
| Total Bases | MLB | 2022 | 22 |
| Rbat+ | MLB | 2022 | 78 |
| rOBA | MLB | 2022 | .290 |
| OPS+ | MLB | 2022 | 83 |
| OPS | MLB | 2022 | .640 |
| SLG | MLB | 2022 | .319 |
| OBP | MLB | 2022 | .321 |
| Hits/At Bats | MLB | 2022 | .217 |
| Strikeouts | MLB | 2022 | 24 |
| Bases on Balls/Walks | MLB | 2022 | 11 |
| Caught Stealing | MLB | 2022 | 0 |
| Stolen Bases | MLB | 2022 | 1 |
| Runs Batted In | MLB | 2022 | 8 |
| Home Runs | MLB | 2022 | 2 |
| Triples | MLB | 2022 | 0 |
| Doubles | MLB | 2022 | 1 |
| Hits | MLB | 2022 | 15 |
| Runs Scored | MLB | 2022 | 9 |
| At Bats | MLB | 2022 | 69 |
| Plate Appearances | MLB | 2022 | 81 |
| Games Played | MLB | 2022 | 29 |
| Wins Above Replacement for position players | MLB | 2022 | -0.1 |
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| Positions Played | MLB | 2021 | /3H |
| 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 | 1 |
| Rbat+ | MLB | 2021 | 11 |
| rOBA | MLB | 2021 | .198 |
| OPS+ | MLB | 2021 | 12 |
| OPS | MLB | 2021 | .393 |
| SLG | MLB | 2021 | .143 |
| OBP | MLB | 2021 | .250 |
| Hits/At Bats | MLB | 2021 | .143 |
| 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 | 1 |
| Runs Scored | MLB | 2021 | 1 |
| At Bats | MLB | 2021 | 7 |
| Plate Appearances | MLB | 2021 | 8 |
| Games Played | MLB | 2021 | 3 |
| Wins Above Replacement for position players | MLB | 2021 | -0.1 |
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| Positions Played | MLB | 2020 | /3D457H |
| Intentional Bases on Balls | MLB | 2020 | 0 |
| Sacrifice Flies | MLB | 2020 | 0 |
| Sacrifice Hits | MLB | 2020 | 0 |
| Times Hit by a Pitch | MLB | 2020 | 0 |
| GIDP | MLB | 2020 | 1 |
| Total Bases | MLB | 2020 | 6 |
| Rbat+ | MLB | 2020 | 56 |
| rOBA | MLB | 2020 | .263 |
| OPS+ | MLB | 2020 | 56 |
| OPS | MLB | 2020 | .566 |
| SLG | MLB | 2020 | .286 |
| OBP | MLB | 2020 | .280 |
| Hits/At Bats | MLB | 2020 | .143 |
| Strikeouts | MLB | 2020 | 8 |
| Bases on Balls/Walks | MLB | 2020 | 4 |
| Caught Stealing | MLB | 2020 | 0 |
| Stolen Bases | MLB | 2020 | 0 |
| Runs Batted In | MLB | 2020 | 1 |
| Home Runs | MLB | 2020 | 1 |
| Triples | MLB | 2020 | 0 |
| Doubles | MLB | 2020 | 0 |
| Hits | MLB | 2020 | 3 |
| Runs Scored | MLB | 2020 | 3 |
| At Bats | MLB | 2020 | 21 |
| Plate Appearances | MLB | 2020 | 25 |
| Games Played | MLB | 2020 | 8 |
| Wins Above Replacement for position players | MLB | 2020 | -0.3 |
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| Positions Played | MLB | 2019 | 53/H |
| 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 | 4 |
| Total Bases | MLB | 2019 | 62 |
| Rbat+ | MLB | 2019 | 81 |
| rOBA | MLB | 2019 | .302 |
| OPS+ | MLB | 2019 | 86 |
| OPS | MLB | 2019 | .714 |
| SLG | MLB | 2019 | .422 |
| OBP | MLB | 2019 | .293 |
| Hits/At Bats | MLB | 2019 | .211 |
| Strikeouts | MLB | 2019 | 52 |
| Bases on Balls/Walks | MLB | 2019 | 17 |
| Caught Stealing | MLB | 2019 | 0 |
| Stolen Bases | MLB | 2019 | 0 |
| Runs Batted In | MLB | 2019 | 23 |
| Home Runs | MLB | 2019 | 8 |
| Triples | MLB | 2019 | 0 |
| Doubles | MLB | 2019 | 7 |
| Hits | MLB | 2019 | 31 |
| Runs Scored | MLB | 2019 | 17 |
| At Bats | MLB | 2019 | 147 |
| Plate Appearances | MLB | 2019 | 164 |
| Games Played | MLB | 2019 | 53 |
| Wins Above Replacement for position players | MLB | 2019 | 0.3 |
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