Peter Morgan Alonso (born December 7, 1994), nicknamed "Polar Bear Pete", is an American professional baseball first baseman for the New York Mets of Major League Baseball (MLB). He made his MLB debut during the 2019 season and broke the major league record for the most home runs by a rookie with 53. He was also the first Mets player to hit 50 or more home runs in a season, setting the Mets' single-season home run record in the process.
Trophies 
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| Positions Played | MLB | 2025 | *3/D |
| Intentional Bases on Balls | MLB | 2025 | 5 |
| Sacrifice Flies | MLB | 2025 | 9 |
| Sacrifice Hits | MLB | 2025 | 0 |
| Times Hit by a Pitch | MLB | 2025 | 15 |
| GIDP | MLB | 2025 | 23 |
| Total Bases | MLB | 2025 | 327 |
| Rbat+ | MLB | 2025 | 142 |
| rOBA | MLB | 2025 | .371 |
| OPS+ | MLB | 2025 | 144 |
| OPS | MLB | 2025 | .871 |
| SLG | MLB | 2025 | .524 |
| OBP | MLB | 2025 | .347 |
| Hits/At Bats | MLB | 2025 | .272 |
| Strikeouts | MLB | 2025 | 162 |
| Bases on Balls/Walks | MLB | 2025 | 61 |
| Caught Stealing | MLB | 2025 | 2 |
| Stolen Bases | MLB | 2025 | 1 |
| Runs Batted In | MLB | 2025 | 126 |
| Home Runs | MLB | 2025 | 38 |
| Triples | MLB | 2025 | 1 |
| Doubles | MLB | 2025 | 41 |
| Hits | MLB | 2025 | 170 |
| Runs Scored | MLB | 2025 | 87 |
| At Bats | MLB | 2025 | 624 |
| Plate Appearances | MLB | 2025 | 709 |
| Games Played | MLB | 2025 | 162 |
| Wins Above Replacement for position players | MLB | 2025 | 3.4 |
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| Positions Played | MLB | 2024 | *3/DH |
| Intentional Bases on Balls | MLB | 2024 | 4 |
| Sacrifice Flies | MLB | 2024 | 4 |
| Sacrifice Hits | MLB | 2024 | 0 |
| Times Hit by a Pitch | MLB | 2024 | 13 |
| GIDP | MLB | 2024 | 14 |
| Total Bases | MLB | 2024 | 279 |
| Rbat+ | MLB | 2024 | 122 |
| rOBA | MLB | 2024 | .341 |
| OPS+ | MLB | 2024 | 122 |
| OPS | MLB | 2024 | .788 |
| SLG | MLB | 2024 | .459 |
| OBP | MLB | 2024 | .329 |
| Hits/At Bats | MLB | 2024 | .240 |
| Strikeouts | MLB | 2024 | 172 |
| Bases on Balls/Walks | MLB | 2024 | 70 |
| Caught Stealing | MLB | 2024 | 0 |
| Stolen Bases | MLB | 2024 | 3 |
| Runs Batted In | MLB | 2024 | 88 |
| Home Runs | MLB | 2024 | 34 |
| Triples | MLB | 2024 | 0 |
| Doubles | MLB | 2024 | 31 |
| Hits | MLB | 2024 | 146 |
| Runs Scored | MLB | 2024 | 91 |
| At Bats | MLB | 2024 | 608 |
| Plate Appearances | MLB | 2024 | 695 |
| Games Played | MLB | 2024 | 162 |
| Wins Above Replacement for position players | MLB | 2024 | 2.6 |
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| Positions Played | MLB | 2023 | *3/D |
| Intentional Bases on Balls | MLB | 2023 | 6 |
| Sacrifice Flies | MLB | 2023 | 4 |
| Sacrifice Hits | MLB | 2023 | 0 |
| Times Hit by a Pitch | MLB | 2023 | 21 |
| GIDP | MLB | 2023 | 17 |
| Total Bases | MLB | 2023 | 286 |
| Rbat+ | MLB | 2023 | 122 |
| rOBA | MLB | 2023 | .351 |
| OPS+ | MLB | 2023 | 123 |
| OPS | MLB | 2023 | .821 |
| SLG | MLB | 2023 | .504 |
| OBP | MLB | 2023 | .318 |
| Hits/At Bats | MLB | 2023 | .217 |
| Strikeouts | MLB | 2023 | 151 |
| Bases on Balls/Walks | MLB | 2023 | 65 |
| Caught Stealing | MLB | 2023 | 1 |
| Stolen Bases | MLB | 2023 | 4 |
| Runs Batted In | MLB | 2023 | 118 |
| Home Runs | MLB | 2023 | 46 |
| Triples | MLB | 2023 | 2 |
| Doubles | MLB | 2023 | 21 |
| Hits | MLB | 2023 | 123 |
| Runs Scored | MLB | 2023 | 92 |
| At Bats | MLB | 2023 | 568 |
| Plate Appearances | MLB | 2023 | 658 |
| Games Played | MLB | 2023 | 154 |
| Wins Above Replacement for position players | MLB | 2023 | 3.3 |
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| Positions Played | MLB | 2022 | *3D |
| Intentional Bases on Balls | MLB | 2022 | 16 |
| Sacrifice Flies | MLB | 2022 | 9 |
| Sacrifice Hits | MLB | 2022 | 0 |
| Times Hit by a Pitch | MLB | 2022 | 12 |
| GIDP | MLB | 2022 | 17 |
| Total Bases | MLB | 2022 | 309 |
| Rbat+ | MLB | 2022 | 143 |
| rOBA | MLB | 2022 | .371 |
| OPS+ | MLB | 2022 | 146 |
| OPS | MLB | 2022 | .869 |
| SLG | MLB | 2022 | .518 |
| OBP | MLB | 2022 | .352 |
| Hits/At Bats | MLB | 2022 | .271 |
| Strikeouts | MLB | 2022 | 128 |
| Bases on Balls/Walks | MLB | 2022 | 67 |
| Caught Stealing | MLB | 2022 | 1 |
| Stolen Bases | MLB | 2022 | 5 |
| Runs Batted In | MLB | 2022 | 131 |
| Home Runs | MLB | 2022 | 40 |
| Triples | MLB | 2022 | 0 |
| Doubles | MLB | 2022 | 27 |
| Hits | MLB | 2022 | 162 |
| Runs Scored | MLB | 2022 | 95 |
| At Bats | MLB | 2022 | 597 |
| Plate Appearances | MLB | 2022 | 685 |
| Games Played | MLB | 2022 | 160 |
| Wins Above Replacement for position players | MLB | 2022 | 4.4 |
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| Positions Played | MLB | 2021 | *3/DH |
| Intentional Bases on Balls | MLB | 2021 | 6 |
| Sacrifice Flies | MLB | 2021 | 4 |
| Sacrifice Hits | MLB | 2021 | 0 |
| Times Hit by a Pitch | MLB | 2021 | 12 |
| GIDP | MLB | 2021 | 20 |
| Total Bases | MLB | 2021 | 291 |
| Rbat+ | MLB | 2021 | 137 |
| rOBA | MLB | 2021 | .377 |
| OPS+ | MLB | 2021 | 133 |
| OPS | MLB | 2021 | .863 |
| SLG | MLB | 2021 | .519 |
| OBP | MLB | 2021 | .344 |
| Hits/At Bats | MLB | 2021 | .262 |
| Strikeouts | MLB | 2021 | 127 |
| Bases on Balls/Walks | MLB | 2021 | 60 |
| Caught Stealing | MLB | 2021 | 0 |
| Stolen Bases | MLB | 2021 | 3 |
| Runs Batted In | MLB | 2021 | 94 |
| Home Runs | MLB | 2021 | 37 |
| Triples | MLB | 2021 | 3 |
| Doubles | MLB | 2021 | 27 |
| Hits | MLB | 2021 | 147 |
| Runs Scored | MLB | 2021 | 81 |
| At Bats | MLB | 2021 | 561 |
| Plate Appearances | MLB | 2021 | 637 |
| Games Played | MLB | 2021 | 152 |
| Wins Above Replacement for position players | MLB | 2021 | 4.1 |
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| Positions Played | MLB | 2020 | 3D/H |
| Intentional Bases on Balls | MLB | 2020 | 4 |
| Sacrifice Flies | MLB | 2020 | 1 |
| Sacrifice Hits | MLB | 2020 | 0 |
| Times Hit by a Pitch | MLB | 2020 | 6 |
| GIDP | MLB | 2020 | 4 |
| Total Bases | MLB | 2020 | 102 |
| Rbat+ | MLB | 2020 | 114 |
| rOBA | MLB | 2020 | .342 |
| OPS+ | MLB | 2020 | 122 |
| OPS | MLB | 2020 | .817 |
| SLG | MLB | 2020 | .490 |
| OBP | MLB | 2020 | .326 |
| Hits/At Bats | MLB | 2020 | .231 |
| Strikeouts | MLB | 2020 | 61 |
| Bases on Balls/Walks | MLB | 2020 | 24 |
| Caught Stealing | MLB | 2020 | 0 |
| Stolen Bases | MLB | 2020 | 1 |
| Runs Batted In | MLB | 2020 | 35 |
| Home Runs | MLB | 2020 | 16 |
| Triples | MLB | 2020 | 0 |
| Doubles | MLB | 2020 | 6 |
| Hits | MLB | 2020 | 48 |
| Runs Scored | MLB | 2020 | 31 |
| At Bats | MLB | 2020 | 208 |
| Plate Appearances | MLB | 2020 | 239 |
| Games Played | MLB | 2020 | 57 |
| Wins Above Replacement for position players | MLB | 2020 | 0.1 |
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| Positions Played | MLB | 2019 | *3/HD |
| Intentional Bases on Balls | MLB | 2019 | 6 |
| Sacrifice Flies | MLB | 2019 | 3 |
| Sacrifice Hits | MLB | 2019 | 0 |
| Times Hit by a Pitch | MLB | 2019 | 21 |
| GIDP | MLB | 2019 | 13 |
| Total Bases | MLB | 2019 | 348 |
| Rbat+ | MLB | 2019 | 154 |
| rOBA | MLB | 2019 | .399 |
| OPS+ | MLB | 2019 | 147 |
| OPS | MLB | 2019 | .941 |
| SLG | MLB | 2019 | .583 |
| OBP | MLB | 2019 | .358 |
| Hits/At Bats | MLB | 2019 | .260 |
| Strikeouts | MLB | 2019 | 183 |
| Bases on Balls/Walks | MLB | 2019 | 72 |
| Caught Stealing | MLB | 2019 | 0 |
| Stolen Bases | MLB | 2019 | 1 |
| Runs Batted In | MLB | 2019 | 120 |
| Home Runs | MLB | 2019 | 53 |
| Triples | MLB | 2019 | 2 |
| Doubles | MLB | 2019 | 30 |
| Hits | MLB | 2019 | 155 |
| Runs Scored | MLB | 2019 | 103 |
| At Bats | MLB | 2019 | 597 |
| Plate Appearances | MLB | 2019 | 693 |
| Games Played | MLB | 2019 | 161 |
| Wins Above Replacement for position players | MLB | 2019 | 5.4 |
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