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| Name | Team | Age |
| Naoki Masumoto | Retired (1984, Age 35) | Died (2022, Age 73) |
| Drafted | Position | Bats/Throws |
| Round 3, Pick 41 (1980) |
RP | R/R |
| League | Option Years
|
Majors Service Time |
| Bobby Doerr League | 0 | 0 years (147 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 | 6/16/1949 | |
| 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 | Type
|
Chances
|
Endurance | Velocity | Control | Total |
| 1980 | Minors | 68.00 | 0 / 4 | 0 / 30 | 0 / 34 | 0 / 68 |
| 1981 | Minors | 72.00 | 0 / 3 | 1 / 34 | 0 / 35 | 1 / 72 |
| 1982 | Minors | 67.00 | 0 / 4 | 0 / 30 | 0 / 33 | 0 / 67 |
| 1983 | Minors | 7.00 | 0 / 1 | 0 / 2 | 0 / 4 | 0 / 7 |
| 1983 | Majors | 22.64 | -1 / 0 | -3 / 10 | -5 / 12 | -9 / 22 |
| 1984 | Minors | 29.00 | 0 / 1 | 0 / 10 | 1 / 18 | 1 / 29 |
| 1984 | Majors | 25.00 | 0 / 0 | 1 / 12 | 1 / 13 | 2 / 25 |
| Total | -1 / 13 | -1 / 128 | -3 / 149 | -5 / 290 |
| Date | Transaction |
| 1984-11-01 | Naoki Masumoto has retired from the Free Agency Pool |
| 1984-06-25 | The Chicago Chaperones have waived Naoki Masumoto. |
| 1984-03-25 | The Chicago Chaperones have promoted Angel Slattery to the major league team. The Chicago Chaperones have promoted Mike Ake to the major league team. The Chicago Chaperones have promoted Al Hughes to the major league team. The Chicago Chaperones have designated Stew Block for assignment. The Chicago Chaperones have designated Naoki Masumoto for assignment. |
| 1983-04-18 | The Chicago Chaperones have promoted Naoki Masumoto to the major league team. |