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| Name | Team | Age |
| John Kleven | Retired (2035, Age 34) | Died (2063, Age 63) |
| Drafted | Position | Bats/Throws |
| Round 4, Pick 61 (2022) |
RP | R/R |
| League | Option Years
|
Majors Service Time |
| Orlando Cepeda League (A) | 0 | 8 years (137 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 | 12/2/2000 | |
| WS Rings | WS Appearances | LCS Appearances |
| 1 | 1 | 1 |
| 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 |
| 2026 | LHB | 29 | 77.0 | 59 | 46 | 107 | 1.99 |
| 2026 | RHB | 29 | 78.2 | 70 | 41 | 90 | 1.67 |
| 2027 | LHB | 35 | 135.2 | 86 | 74 | 161 | 1.73 |
| 2027 | RHB | 35 | 98.0 | 68 | 42 | 129 | 1.74 |
| 2028 | LHB | 34 | 121.1 | 95 | 100 | 157 | 2.12 |
| 2028 | RHB | 33 | 111.0 | 78 | 30 | 119 | 1.34 |
| 2029 | LHB | 54 | 29.2 | 15 | 16 | 25 | 1.38 |
| 2029 | RHB | 55 | 25.1 | 18 | 9 | 26 | 1.38 |
| 2030 | LHB | 41 | 26.1 | 25 | 14 | 24 | 1.44 |
| 2030 | RHB | 42 | 27.0 | 27 | 6 | 33 | 1.44 |
| 2031 | LHB | 38 | 25.1 | 18 | 8 | 20 | 1.11 |
| 2031 | RHB | 36 | 22.0 | 25 | 10 | 19 | 1.32 |
| 2032 | LHB | 28 | 21.0 | 13 | 4 | 32 | 1.71 |
| 2032 | RHB | 24 | 16.2 | 15 | 13 | 10 | 1.38 |
| 2033 | LHB | 65 | 44.2 | 31 | 20 | 49 | 1.54 |
| 2033 | RHB | 46 | 22.0 | 16 | 5 | 24 | 1.32 |
| 2034 | LHB | 29 | 32.2 | 31 | 17 | 28 | 1.38 |
| 2034 | RHB | 28 | 32.2 | 26 | 13 | 18 | 0.95 |
| 2121 | AHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2121 | HHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2121 | LHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| 2121 | RHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| Total | AHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| Total | HHB | 0 | 0.0 | 0 | 0 | 0 | 0.00 |
| Total | LHB | 353 | 513.2 | 373 | 299 | 603 | 1.76 |
| Total | RHB | 328 | 433.1 | 343 | 169 | 468 | 1.47 |
| Total | 376 | 947.0 | 716 | 468 | 1071 | 1.63 |
| Date | Transaction |
| 2035-11-01 | John Kleven has retired from the Free Agency Pool |
| 2035-04-12 | The Baltimore Black Soxx have waived John Kleven. |
| 2035-04-01 | The Cleveland Black Soxx have promoted Julian Tavarez to the major league team. The Cleveland Black Soxx have promoted Brooklyn DeShong to the major league team. The Cleveland Black Soxx have promoted Kevin Rotblatt to the major league team. The Cleveland Black Soxx have designated Tony Taylor for assignment. The Cleveland Black Soxx have designated John Kleven for assignment. The Cleveland Black Soxx have designated Graeme Weaver for assignment. |
| 2034-06-26 | A trade has been completed between the Chicago Smitties and the Cleveland Black Soxx. The Cleveland Black Soxx receive Tony Taylor, John Kleven, Jake Robinson, Lyman Bonura, Draft Pick - 2035 Round 1 (CHA) from the Chicago Smitties in exchange for John Smith, Donn Fabrique. |
| 2026-05-10 | The Chicago Smitties have promoted John Kleven to the major league team. The Chicago Smitties have sent Branch Gyselman to the minors. |
| 2026-04-11 | The Chicago Smitties have promoted Jimmy Doyle to the major league team. The Chicago Smitties have sent John Kleven to the minors. |
| 2026-04-01 | The Chicago Smitties have promoted John Kleven to the major league team. The Chicago Smitties have sent Bobby Torve to the minors. |
| 2026-04-01 | The Chicago Smitties have acquired John Kleven from the waiver wire. |
| 2023-04-19 | The Washington Mountain Citys have waived John Kleven. |