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| Name | Team | Age |
| John Hallett | Retired (2026, Age 34) | Died (2068, Age 77) |
| Drafted | Position | Bats/Throws |
| Round 2, Pick 25 (2014) |
SP | L/L |
| League | Option Years
|
Majors Service Time |
| Ken Griffey Jr League | 0 | 4 years (149 games) |
| Total Rating
|
Arm | Range |
| Contact vs R | Contact vs L | Speed |
| Power vs R | Power vs L | Bunting |
| Endurance | Velocity | Control |
| Leadership
|
Mentor Value
|
|
| Health
|
Injured Days
|
Birthday |
| 0 | 11/13/1991 | |
| WS Rings | WS Appearances | LCS Appearances |
| 0 | 0 | 0 |
| Alt Pos (---) | Alt Pos (---) | Alt Pos (---) |
| (0.0 %) | (0.0 %) | (0.0 %) |
Stats | Splits | Playoffs | Energy | Improvements | Past Skills | Awards | Batting | Fielding | Game Log
| Year | Vs | G | IP | SO | BB | H | WHIP |
| 2021 | AHB | 13 | 75.1 | 46 | 22 | 87 | 1.45 |
| 2021 | HHB | 13 | 87.0 | 56 | 28 | 89 | 1.34 |
| 2021 | LHB | 26 | 47.0 | 37 | 21 | 55 | 1.62 |
| 2021 | RHB | 26 | 115.1 | 65 | 29 | 121 | 1.30 |
| 2022 | AHB | 22 | 56.0 | 30 | 21 | 75 | 1.71 |
| 2022 | HHB | 20 | 63.1 | 41 | 21 | 80 | 1.59 |
| 2022 | LHB | 34 | 32.0 | 20 | 11 | 39 | 1.56 |
| 2022 | RHB | 42 | 87.1 | 51 | 31 | 116 | 1.68 |
| 2023 | AHB | 15 | 29.1 | 22 | 9 | 39 | 1.64 |
| 2023 | HHB | 18 | 58.0 | 36 | 21 | 43 | 1.10 |
| 2023 | LHB | 30 | 27.2 | 18 | 7 | 21 | 1.01 |
| 2023 | RHB | 32 | 59.2 | 40 | 23 | 61 | 1.41 |
| 2024 | AHB | 17 | 38.2 | 23 | 13 | 55 | 1.76 |
| 2024 | HHB | 12 | 44.1 | 28 | 10 | 57 | 1.51 |
| 2024 | LHB | 21 | 20.1 | 9 | 3 | 17 | 0.98 |
| 2024 | RHB | 29 | 62.2 | 42 | 20 | 95 | 1.84 |
| 2025 | AHB | 30 | 65.0 | 38 | 21 | 68 | 1.37 |
| 2025 | HHB | 17 | 34.1 | 20 | 9 | 37 | 1.34 |
| 2025 | LHB | 31 | 22.0 | 17 | 11 | 17 | 1.27 |
| 2025 | RHB | 45 | 77.1 | 41 | 19 | 88 | 1.38 |
| 2026 | AHB | 1 | 3.2 | 1 | 3 | 6 | 2.45 |
| 2026 | HHB | 3 | 20.2 | 14 | 9 | 17 | 1.26 |
| 2026 | LHB | 3 | 5.1 | 4 | 0 | 3 | 0.56 |
| 2026 | RHB | 4 | 19.0 | 11 | 12 | 20 | 1.68 |
| 2080 | AHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2080 | HHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2080 | LHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2080 | RHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| Total | AHB | 98 | 268.0 | 160 | 89 | 330 | 1.56 |
| Total | HHB | 83 | 307.2 | 195 | 98 | 323 | 1.37 |
| Total | LHB | 145 | 154.1 | 105 | 53 | 152 | 1.33 |
| Total | RHB | 178 | 421.1 | 250 | 134 | 501 | 1.51 |
| Total | 181 | 575.2 | 355 | 187 | 653 | 1.46 |
| Date | Transaction |
| 2026-11-01 | John Hallett has retired from the Free Agency Pool |
| 2026-07-31 | The Oakland Athletics have waived John Hallett. |
| 2026-04-25 | The Oakland Athletics have designated John Hallett for assignment. |
| 2026-04-05 | The Oakland Athletics have acquired John Hallett from the waiver wire. |
| 2026-03-05 | The Houston Twins have promoted David Strauss to the major league team. The Houston Twins have designated John Hallett for assignment. |
| 2024-07-25 | John Hallett of the Houston Twins is injured and is expected to be out 29 days. |
| 2021-05-05 | The Houston Twins have promoted John Hallett to the major league team. The Houston Twins have sent Paddy Cron to the minors. |
| 2018-05-24 | The Houston Twins have acquired John Hallett from the waiver wire. |
| 2015-04-06 | The Baltimore Pikers have waived John Hallett. |