Steven Jakob Matz (born May 29, 1991) is an American professional baseball pitcher for the St. Louis Cardinals of Major League Baseball (MLB). He has previously played for the New York Mets and Toronto Blue Jays.
Matz was born and raised on Long Island and played baseball for Ward Melville High School in East Setauket, New York. The Mets drafted him directly out of high school in the second round of the 2009 MLB draft, with the 72nd overall selection.

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| SO/BB | MLB | 2025 | 6.00 |
| SO9 | MLB | 2025 | 5.0 |
| BB9 | MLB | 2025 | 0.8 |
| HR9 | MLB | 2025 | 1.7 |
| H9 | MLB | 2025 | 7.1 |
| WHIP | MLB | 2025 | 0.877 |
| Fielding Independent Pitching | MLB | 2025 | 4.84 |
| ERA+ | MLB | 2025 | 201 |
| Batters Faced | MLB | 2025 | 82 |
| Wild Pitches | MLB | 2025 | 1 |
| Balks | MLB | 2025 | 0 |
| Times Hit by a Pitch | MLB | 2025 | 1 |
| Strikeouts | MLB | 2025 | 12 |
| Intentional Bases on Balls | MLB | 2025 | 0 |
| Bases on Balls/Walks | MLB | 2025 | 2 |
| Home Runs Allowed | MLB | 2025 | 4 |
| Earned Runs Allowed | MLB | 2025 | 5 |
| Runs Allowed | MLB | 2025 | 6 |
| Hits Allowed | MLB | 2025 | 17 |
| Innings Pitched | MLB | 2025 | 21.2 |
| Saves | MLB | 2025 | 1 |
| Shutouts | MLB | 2025 | 0 |
| Complete Games | MLB | 2025 | 0 |
| Games Finished | MLB | 2025 | 2 |
| Games Started | MLB | 2025 | 0 |
| Games Pitched | MLB | 2025 | 21 |
| ERA | MLB | 2025 | 2.08 |
| Loss | MLB | 2025 | 0 |
| Wins | MLB | 2025 | 0 |
| Wins Above Replacement for Pitchers | MLB | 2025 | 0.5 |
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| SO/BB | MLB | 2021 | 3.35 |
| SO9 | MLB | 2021 | 8.6 |
| BB9 | MLB | 2021 | 2.6 |
| HR9 | MLB | 2021 | 1.1 |
| H9 | MLB | 2021 | 9.4 |
| WHIP | MLB | 2021 | 1.334 |
| Fielding Independent Pitching | MLB | 2021 | 3.79 |
| ERA+ | MLB | 2021 | 117 |
| Batters Faced | MLB | 2021 | 647 |
| Wild Pitches | MLB | 2021 | 5 |
| Balks | MLB | 2021 | 1 |
| Home Runs Allowed | MLB | 2021 | 18 |
| Earned Runs Allowed | MLB | 2021 | 64 |
| Runs Allowed | MLB | 2021 | 70 |
| Hits Allowed | MLB | 2021 | 158 |
| Innings Pitched | MLB | 2021 | 150.2 |
| Saves | MLB | 2021 | 0 |
| Shutouts | MLB | 2021 | 0 |
| Complete Games | MLB | 2021 | 0 |
| Games Finished | MLB | 2021 | 0 |
| Games Started | MLB | 2021 | 29 |
| Games Pitched | MLB | 2021 | 29 |
| ERA | MLB | 2021 | 3.82 |
| Win-Loss Percentage | MLB | 2021 | .667 |
| Loss | MLB | 2021 | 7 |
| Wins | MLB | 2021 | 14 |
| Wins Above Replacement for Pitchers | MLB | 2021 | 2.2 |
| 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 | -129 |
| rOBA | MLB | 2021 | .000 |
| OPS+ | MLB | 2021 | -100 |
| OPS | MLB | 2021 | .000 |
| SLG | MLB | 2021 | .000 |
| OBP | MLB | 2021 | .000 |
| Hits/At Bats | MLB | 2021 | .000 |
| Strikeouts | MLB | 2021 | 1 |
| 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 | 2 |
| Plate Appearances | MLB | 2021 | 2 |
| Games Played | MLB | 2021 | 1 |
| Wins Above Replacement for position players | MLB | 2021 | 0.0 |
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| Positions Played | MLB | 2019 | 1/H |
| Intentional Bases on Balls | MLB | 2019 | 0 |
| Sacrifice Flies | MLB | 2019 | 0 |
| Sacrifice Hits | MLB | 2019 | 4 |
| Times Hit by a Pitch | MLB | 2019 | 0 |
| GIDP | MLB | 2019 | 0 |
| Total Bases | MLB | 2019 | 16 |
| Rbat+ | MLB | 2019 | 29 |
| rOBA | MLB | 2019 | .232 |
| OPS+ | MLB | 2019 | 36 |
| OPS | MLB | 2019 | .509 |
| SLG | MLB | 2019 | .281 |
| OBP | MLB | 2019 | .228 |
| Hits/At Bats | MLB | 2019 | .228 |
| Strikeouts | MLB | 2019 | 17 |
| Bases on Balls/Walks | MLB | 2019 | 0 |
| Caught Stealing | MLB | 2019 | 0 |
| Stolen Bases | MLB | 2019 | 0 |
| Runs Batted In | MLB | 2019 | 1 |
| Home Runs | MLB | 2019 | 1 |
| Triples | MLB | 2019 | 0 |
| Doubles | MLB | 2019 | 0 |
| Hits | MLB | 2019 | 13 |
| Runs Scored | MLB | 2019 | 4 |
| At Bats | MLB | 2019 | 57 |
| Plate Appearances | MLB | 2019 | 61 |
| Games Played | MLB | 2019 | 35 |
| Wins Above Replacement for position players | MLB | 2019 | 0.3 |
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| Positions Played | MLB | 2018 | 1 |
| Intentional Bases on Balls | MLB | 2018 | 0 |
| Sacrifice Flies | MLB | 2018 | 0 |
| Sacrifice Hits | MLB | 2018 | 4 |
| Times Hit by a Pitch | MLB | 2018 | 0 |
| GIDP | MLB | 2018 | 1 |
| Total Bases | MLB | 2018 | 12 |
| Rbat+ | MLB | 2018 | -3 |
| rOBA | MLB | 2018 | .188 |
| OPS+ | MLB | 2018 | 17 |
| OPS | MLB | 2018 | .424 |
| SLG | MLB | 2018 | .261 |
| OBP | MLB | 2018 | .163 |
| Hits/At Bats | MLB | 2018 | .109 |
| Strikeouts | MLB | 2018 | 13 |
| Bases on Balls/Walks | MLB | 2018 | 3 |
| Caught Stealing | MLB | 2018 | 0 |
| Stolen Bases | MLB | 2018 | 0 |
| Runs Batted In | MLB | 2018 | 4 |
| Home Runs | MLB | 2018 | 2 |
| Triples | MLB | 2018 | 0 |
| Doubles | MLB | 2018 | 1 |
| Hits | MLB | 2018 | 5 |
| Runs Scored | MLB | 2018 | 2 |
| At Bats | MLB | 2018 | 46 |
| Plate Appearances | MLB | 2018 | 53 |
| Games Played | MLB | 2018 | 29 |
| Wins Above Replacement for position players | MLB | 2018 | 0.2 |
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| Positions Played | MLB | 2017 | 1/H |
| Intentional Bases on Balls | MLB | 2017 | 0 |
| Sacrifice Flies | MLB | 2017 | 0 |
| Sacrifice Hits | MLB | 2017 | 3 |
| Times Hit by a Pitch | MLB | 2017 | 0 |
| GIDP | MLB | 2017 | 0 |
| Total Bases | MLB | 2017 | 3 |
| Rbat+ | MLB | 2017 | -68 |
| rOBA | MLB | 2017 | .123 |
| OPS+ | MLB | 2017 | -23 |
| OPS | MLB | 2017 | .286 |
| SLG | MLB | 2017 | .143 |
| OBP | MLB | 2017 | .143 |
| Hits/At Bats | MLB | 2017 | .143 |
| Strikeouts | MLB | 2017 | 7 |
| Bases on Balls/Walks | MLB | 2017 | 0 |
| Caught Stealing | MLB | 2017 | 0 |
| Stolen Bases | MLB | 2017 | 0 |
| Runs Batted In | MLB | 2017 | 1 |
| Home Runs | MLB | 2017 | 0 |
| Triples | MLB | 2017 | 0 |
| Doubles | MLB | 2017 | 0 |
| Hits | MLB | 2017 | 3 |
| Runs Scored | MLB | 2017 | 1 |
| At Bats | MLB | 2017 | 21 |
| Plate Appearances | MLB | 2017 | 24 |
| Games Played | MLB | 2017 | 17 |
| Wins Above Replacement for position players | MLB | 2017 | -0.1 |
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| Positions Played | MLB | 2016 | 1/H |
| Intentional Bases on Balls | MLB | 2016 | 0 |
| Sacrifice Flies | MLB | 2016 | 1 |
| Sacrifice Hits | MLB | 2016 | 4 |
| Times Hit by a Pitch | MLB | 2016 | 0 |
| GIDP | MLB | 2016 | 2 |
| Total Bases | MLB | 2016 | 8 |
| Rbat+ | MLB | 2016 | -1 |
| rOBA | MLB | 2016 | .200 |
| OPS+ | MLB | 2016 | 21 |
| OPS | MLB | 2016 | .442 |
| SLG | MLB | 2016 | .222 |
| OBP | MLB | 2016 | .220 |
| Hits/At Bats | MLB | 2016 | .139 |
| Strikeouts | MLB | 2016 | 11 |
| Bases on Balls/Walks | MLB | 2016 | 4 |
| Caught Stealing | MLB | 2016 | 0 |
| Stolen Bases | MLB | 2016 | 0 |
| Runs Batted In | MLB | 2016 | 2 |
| Home Runs | MLB | 2016 | 0 |
| Triples | MLB | 2016 | 1 |
| Doubles | MLB | 2016 | 1 |
| Hits | MLB | 2016 | 5 |
| Runs Scored | MLB | 2016 | 0 |
| At Bats | MLB | 2016 | 36 |
| Plate Appearances | MLB | 2016 | 45 |
| Games Played | MLB | 2016 | 22 |
| Wins Above Replacement for position players | MLB | 2016 | 0.1 |
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| Positions Played | MLB | 2015 | /1 |
| Intentional Bases on Balls | MLB | 2015 | 0 |
| Sacrifice Flies | MLB | 2015 | 0 |
| Sacrifice Hits | MLB | 2015 | 0 |
| Times Hit by a Pitch | MLB | 2015 | 0 |
| GIDP | MLB | 2015 | 1 |
| Total Bases | MLB | 2015 | 5 |
| Rbat+ | MLB | 2015 | 65 |
| rOBA | MLB | 2015 | .277 |
| OPS+ | MLB | 2015 | 78 |
| OPS | MLB | 2015 | .643 |
| SLG | MLB | 2015 | .357 |
| OBP | MLB | 2015 | .286 |
| Hits/At Bats | MLB | 2015 | .286 |
| Strikeouts | MLB | 2015 | 1 |
| Bases on Balls/Walks | MLB | 2015 | 0 |
| Caught Stealing | MLB | 2015 | 0 |
| Stolen Bases | MLB | 2015 | 0 |
| Runs Batted In | MLB | 2015 | 5 |
| Home Runs | MLB | 2015 | 0 |
| Triples | MLB | 2015 | 0 |
| Doubles | MLB | 2015 | 1 |
| Hits | MLB | 2015 | 4 |
| Runs Scored | MLB | 2015 | 1 |
| At Bats | MLB | 2015 | 14 |
| Plate Appearances | MLB | 2015 | 14 |
| Games Played | MLB | 2015 | 6 |
| Wins Above Replacement for position players | MLB | 2015 | 0.1 |
|