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| Name | Team | Age |
| Roy Williams | Retired (1953, Age 28) | Died (1997, Age 73) |
| Drafted | Position | Bats/Throws |
| Round 29, Pick 453 (1950) |
CF | R/R |
| League | Option Years
|
Majors Service Time |
| Amos Otis League | 0 | 1 years (153 games) |
| Total Rating
|
Arm | Range |
| Contact vs R | Contact vs L | Speed |
| Power vs R | Power vs L | Bunting |
| Endurance | Velocity | Control |
| Leadership
|
Mentor vs RHP
|
Mentor vs LHP
|
| Health
|
Injured Days
|
Birthday |
| 0 | 11/28/1924 | |
| WS Rings | WS Appearances | LCS Appearances |
| 0 | 0 | 0 |
| Alt Pos (RF) | Alt Pos (1B) | Alt Pos (SS) |
| (80.8 %) | (1.4 %) | (0.2 %) |
Stats | Splits | Playoffs | Positions | Improvements | Past Skills | Awards | Fielding | Game Log
| Year | Vs | G | AB | H | 2B | 3B | HR | RBI | BB | SO | OPS | OBP | SLG | AVG |
| Total | 232 | 607 | 151 | 20 | 8 | 18 | 78 | 49 | 102 | .702 | .305 | .397 | .249 |
| Date | Transaction |
| 1955-11-01 | Roy Williams has retired from the Free Agency Pool |
| 1954-05-02 | The Chicago Red Stars have acquired Bill Heath from the waiver wire. The Chicago Red Stars have waived Roy Williams. |
| 1954-04-23 | The Chicago Red Stars have designated Roy Williams for assignment. |
| 1954-04-22 | The Chicago Red Stars have promoted Roy Williams to the major league team. The Chicago Red Stars have designated Bob Schofield for assignment. |
| 1954-04-06 | The Chicago Red Stars have promoted Rafael Fritz to the major league team. The Chicago Red Stars have designated Roy Williams for assignment. |
| 1954-03-01 | The Chicago Red Stars have renamed Mark Seefeldt to Roy Williams. |
| 1953-07-04 | The Chicago Red Stars have promoted Mark Seefeldt to the major league team. The Chicago Red Stars have sent Les Scheer to the minors. |
| 1953-06-28 | The Chicago Red Stars have acquired Mark Seefeldt from the waiver wire. |
| 1953-06-24 | The Milwaukee Mayhem have waived Mark Seefeldt. |
| 1953-06-17 | The Milwaukee Mayhem have promoted Steve "M" Maier to the major league team. The Milwaukee Mayhem have designated Mark Seefeldt for assignment. |
| 1950-08-29 | The Milwaukee Mayhem have sent Barry Gallivan to the minors. The Milwaukee Mayhem have promoted Mark Seefeldt to the major league team. |
| 1950-08-29 | The Milwaukee Mayhem have promoted Barry Gallivan to the major league team. The Milwaukee Mayhem have sent Mark Seefeldt to the minors. |
| 1950-05-28 | The Milwaukee Mayhem have promoted Mark Seefeldt to the major league team. The Milwaukee Mayhem have sent Mark Brouhard to the minors. |
| 1950-04-01 | The Milwaukee Mayhem have renamed Roy Williams to Mark Seefeldt. |