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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
| 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. |