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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
|---|---|---|---|---|---|---|---|---|---|
| Kevin Kaczmarski | 2017-2017 | .249 | 9 | 44 | 0 | 0 | 0 | 0.00 | 0 |
| Connor Kaden | 2015-2019 | .000 | 0 | 0 | 3 | 7 | 4 | 6.89 | 86 |
| Nick Kahle | 2024-2025 | .309 | 11 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Ryan Kalish | 2016-2016 | .294 | 2 | 10 | 0 | 0 | 0 | 0.00 | 0 |
| Rob Kaminsky | 2016-2019 | .000 | 0 | 0 | 4 | 3 | 0 | 3.09 | 32 |
| James Kaprielian | 2026-2026 | .000 | 0 | 0 | 2 | 1 | 0 | 7.97 | 24 |
| Braden Kapteyn | 2015-2015 | .000 | 0 | 0 | 0 | 1 | 0 | 18.00 | 7 |
| Nathan Karaffa | 2026-2026 | .000 | 0 | 0 | 0 | 1 | 0 | 6.17 | 10 |
| Reece Karalus | 2018-2021 | .000 | 0 | 0 | 8 | 2 | 1 | 3.09 | 59 |
| Ricky Karcher | 2018-2020 | .000 | 0 | 0 | 1 | 1 | 0 | 5.59 | 10 |
| Braedon Karpathios | 2026-2026 | .204 | 2 | 5 | 0 | 0 | 0 | 0.00 | 0 |
| Kenn Kasparek | 2013-2015 | .000 | 0 | 0 | 9 | 1 | 3 | 3.90 | 142 |
| Kobe Kato | 2024-2026 | .225 | 7 | 53 | 0 | 0 | 0 | 0.00 | 0 |
| Gosuke Katoh | 2020-2020 | .310 | 11 | 34 | 0 | 0 | 0 | 0.00 | 0 |
| Mason Katz | 2017-2017 | .252 | 15 | 58 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Katz | 2015-2016 | .254 | 3 | 13 | 0 | 0 | 0 | 0.00 | 0 |
| Karl Kauffmann | 2024-2024 | .000 | 0 | 0 | 2 | 0 | 0 | 2.25 | 10 |
| Branden Kaupe | 2013-2013 | .263 | 0 | 1 | 0 | 0 | 0 | 0.00 | 0 |
| Niko Kavadas | 2023-2024 | .169 | 13 | 51 | 0 | 0 | 0 | 0.00 | 0 |
| Grant Kay | 2018-2019 | .315 | 19 | 67 | 0 | 0 | 0 | 54.00 | 0 |
| Luke Keaschall | 2023-2023 | .312 | 2 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Jerry Keel | 2021-2021 | .000 | 0 | 0 | 1 | 2 | 0 | 3.72 | 39 |
| DaShawn Keirsey Jr. | 2023-2023 | .343 | 4 | 30 | 0 | 0 | 0 | 0.00 | 0 |
| Colt Keith | 2023-2023 | .357 | 4 | 16 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Kelleher | 2016-2017 | .000 | 0 | 0 | 4 | 5 | 26 | 5.14 | 82 |
| Alec Keller | 2016-2017 | .248 | 17 | 75 | 0 | 0 | 0 | 0.00 | 0 |
| Stephen Keller | 2020-2020 | .000 | 0 | 0 | 0 | 1 | 0 | 15.43 | 4 |
| Jared Kelley | 2025-2025 | .000 | 0 | 0 | 2 | 0 | 8 | 3.00 | 28 |
| Trevor Kelley | 2018-2018 | .000 | 0 | 0 | 1 | 2 | 0 | 6.60 | 37 |
| Antoine Kelly | 2026-2026 | .000 | 0 | 0 | 0 | 1 | 0 | 8.31 | 11 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Casey Kelly | 2014-2014 | .000 | 0 | 0 | 7 | 9 | 0 | 5.58 | 153 |
| Michael Kelly | 2021-2021 | .000 | 0 | 0 | 7 | 8 | 0 | 4.21 | 113 |
| Parker Kelly | 2021-2021 | .000 | 0 | 0 | 1 | 2 | 6 | 3.25 | 34 |
| Pat Kelly | 2015-2016 | .243 | 7 | 49 | 0 | 0 | 0 | 0.00 | 0 |
| Ty Kelly | 2013-2013 | .296 | 6 | 31 | 0 | 0 | 0 | 0.00 | 0 |
| Jon Kemmer | 2016-2016 | .225 | 1 | 6 | 0 | 0 | 0 | 0.00 | 0 |
| Trenton Kemp | 2016-2019 | .247 | 30 | 152 | 0 | 0 | 0 | 0.00 | 0 |
| William Kempner | 2024-2025 | .000 | 0 | 0 | 9 | 4 | 8 | 6.27 | 84 |
| Ian Kendall | 2014-2015 | .000 | 0 | 0 | 3 | 9 | 0 | 6.61 | 90 |
| Buddy Kennedy | 2021-2021 | .294 | 1 | 17 | 0 | 0 | 0 | 0.00 | 0 |
| Michael Kennedy | 2024-2024 | .000 | 0 | 0 | 0 | 0 | 0 | 5.14 | 6 |
| Matt Kent | 2018-2022 | .000 | 0 | 0 | 2 | 19 | 0 | 5.94 | 173 |
| Kade Kern | 2024-2026 | .196 | 1 | 3 | 0 | 0 | 0 | 0.00 | 0 |
| Raymond Kerr | 2023-2023 | .000 | 0 | 0 | 1 | 0 | 0 | 0.00 | 5 |
| Jimmy Kerrigan | 2023-2026 | .304 | 13 | 45 | 0 | 0 | 0 | 0.00 | 0 |
| Grae Kessinger | 2023-2023 | .262 | 14 | 61 | 0 | 0 | 0 | 0.00 | 0 |
| Caleb Ketchup | 2025-2025 | .439 | 2 | 8 | 0 | 0 | 0 | 0.00 | 0 |
| Kevin Keyes | 2014-2015 | .273 | 13 | 60 | 0 | 0 | 0 | 0.00 | 0 |
| Robby Kidwell | 2019-2019 | .224 | 2 | 36 | 0 | 0 | 0 | 0.00 | 0 |
| Carter Kieboom | 2017-2026 | .309 | 40 | 189 | 0 | 0 | 0 | 0.00 | 0 |
| Spencer Kieboom | 2015-2015 | .229 | 6 | 41 | 0 | 0 | 0 | 0.00 | 0 |
| Dean Kiekhefer | 2013-2014 | .000 | 0 | 0 | 1 | 7 | 8 | 6.31 | 41 |
| Kevin Kiermaier | 2013-2013 | .246 | 6 | 19 | 0 | 0 | 0 | 0.00 | 0 |
| Tanner Kiest | 2024-2025 | .000 | 0 | 0 | 3 | 8 | 0 | 9.97 | 47 |
| John Kilichowski | 2018-2019 | .000 | 0 | 0 | 5 | 12 | 0 | 6.65 | 129 |
| Franklyn Kilome | 2020-2024 | .000 | 0 | 0 | 23 | 10 | 11 | 3.10 | 275 |
| Larson Kindreich | 2023-2024 | .000 | 0 | 0 | 1 | 2 | 0 | 5.86 | 28 |
| Isiah Kiner-Falefa | 2016-2018 | .261 | 13 | 89 | 0 | 1 | 0 | 45.00 | 0 |
| Jared King | 2015-2017 | .255 | 8 | 54 | 0 | 0 | 0 | 0.00 | 0 |
| Joseph King | 2023-2024 | .000 | 0 | 0 | 9 | 11 | 0 | 4.62 | 109 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Matt King | 2026-2026 | .247 | 3 | 12 | 0 | 0 | 0 | 0.00 | 0 |
| Seaver King | 2025-2025 | .308 | 12 | 66 | 0 | 0 | 0 | 0.00 | 0 |
| Scott Kingery | 2016-2026 | .316 | 9 | 25 | 0 | 0 | 0 | 0.00 | 0 |
| Grant Kipp | 2023-2024 | .000 | 0 | 0 | 1 | 6 | 0 | 6.47 | 63 |
| George Kirby | 2020-2021 | .000 | 0 | 0 | 12 | 10 | 0 | 3.68 | 123 |
| Tanner Kirk | 2017-2017 | .250 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0 |
| Alec Kisena | 2021-2024 | .000 | 0 | 0 | 11 | 4 | 2 | 4.07 | 94 |
| Jeremy Kivel | 2017-2017 | .000 | 0 | 0 | 0 | 1 | 0 | 6.27 | 66 |
| John Klein | 2023-2024 | .000 | 0 | 0 | 8 | 3 | 0 | 4.54 | 94 |
| Will Klein | 2022-2023 | .000 | 0 | 0 | 3 | 1 | 1 | 3.19 | 44 |
| Gabe Klobosits | 2019-2022 | .000 | 0 | 0 | 6 | 10 | 11 | 4.58 | 97 |
| Jacob Kmatz | 2026-2026 | .000 | 0 | 0 | 1 | 2 | 0 | 6.66 | 29 |
| Landon Knack | 2023-2023 | .000 | 0 | 0 | 2 | 3 | 0 | 6.17 | 49 |
| Andrew Knapp | 2014-2015 | .270 | 32 | 123 | 0 | 0 | 0 | 0.00 | 0 |
| Cameron Knight | 2020-2021 | .217 | 4 | 33 | 0 | 0 | 0 | 0.00 | 0 |
| Dusten Knight | 2022-2022 | .000 | 0 | 0 | 4 | 3 | 2 | 4.23 | 86 |
| Andrew Knizner | 2018-2026 | .281 | 10 | 48 | 0 | 0 | 0 | 0.00 | 0 |
| Lucas Knowles | 2024-2025 | .000 | 0 | 0 | 4 | 2 | 0 | 5.75 | 60 |
| Guido Knudson | 2017-2017 | .000 | 0 | 0 | 3 | 0 | 0 | 8.00 | 26 |
| Max Knutson | 2018-2018 | .000 | 0 | 0 | 2 | 4 | 1 | 4.74 | 75 |
| Brandon G. Koch | 2019-2024 | .000 | 0 | 0 | 14 | 7 | 31 | 3.10 | 180 |
| Jack Kochanowicz | 2022-2023 | .222 | 0 | 0 | 1 | 3 | 1 | 5.40 | 76 |
| Stephen Kolek | 2021-2023 | .000 | 0 | 0 | 8 | 2 | 6 | 3.20 | 138 |
| Tyler Kolek | 2019-2020 | .000 | 0 | 0 | 2 | 8 | 14 | 4.23 | 75 |
| Zack Kone | 2020-2020 | .268 | 3 | 24 | 0 | 0 | 0 | 0.00 | 0 |
| Matt Koperniak | 2024-2026 | .401 | 9 | 52 | 0 | 0 | 0 | 0.00 | 0 |
| Rhett Kouba | 2025-2026 | .000 | 0 | 0 | 6 | 4 | 0 | 5.36 | 90 |
| Jackson Kowar | 2020-2021 | .000 | 0 | 0 | 15 | 12 | 0 | 3.79 | 176 |
| Ben Krauth | 2019-2023 | .000 | 0 | 0 | 17 | 10 | 11 | 4.55 | 176 |
| Joseph Krehbiel | 2022-2022 | .000 | 0 | 0 | 1 | 0 | 7 | 0.66 | 42 |
| Player | From-To | Avg | HR | RBI | W | L | SV | ERA | K |
| Tanner Krietemeier | 2015-2016 | .234 | 11 | 37 | 0 | 0 | 0 | 0.00 | 0 |
| Brooks Kriske | 2021-2026 | .000 | 0 | 0 | 9 | 8 | 16 | 3.83 | 105 |
| Jason Krizan | 2017-2017 | .310 | 1 | 15 | 0 | 0 | 0 | 0.00 | 0 |
| Matt Kroon | 2020-2023 | .272 | 16 | 117 | 0 | 0 | 0 | 0.00 | 0 |
| A.J. Kubala | 2015-2016 | .232 | 14 | 71 | 0 | 0 | 0 | 0.00 | 0 |
| John Kuchno | 2015-2016 | .000 | 0 | 0 | 6 | 2 | 5 | 3.58 | 117 |
| Max Kuhn | 2015-2017 | .324 | 10 | 57 | 0 | 0 | 0 | 0.00 | 0 |
| Travis Kuhn | 2025-2025 | .000 | 0 | 0 | 0 | 0 | 0 | 9.00 | 2 |
| Joel Kuhnel | 2026-2026 | .000 | 0 | 0 | 0 | 1 | 4 | 5.40 | 7 |
| Sam Kulasingam | 2025-2025 | .411 | 3 | 23 | 0 | 0 | 0 | 0.00 | 0 |
| Brad Kuntz | 2018-2021 | .000 | 0 | 0 | 6 | 7 | 0 | 3.90 | 139 |
| Justin Kunz | 2022-2022 | .177 | 3 | 9 | 0 | 0 | 0 | 0.00 | 0 |
| Nick Kurtz | 2025-2025 | .420 | 36 | 132 | 0 | 0 | 0 | 0.00 | 0 |
