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| Name | Team | Age |
| Guillermo Mack | Retired (1982, Age 36) | Died (2025, Age 80) |
| Drafted | Position | Bats/Throws |
| Round 2, Pick 32 (1964) |
RP | R/R |
| League | Option Years
|
Majors Service Time |
| Ed ONeill League | 0 | 15 years (132 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 | 12/7/1945 | |
| WS Rings | WS Appearances | LCS Appearances |
| 0 | 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 | League | Award |
| 1975 | AL | All Star Reserve (RP) |
| Date | Transaction |
| 1982-11-01 | Guillermo Mack has retired from the Philadelphia Cheesesteaks |
| 1982-04-04 | The Philadelphia Cheesesteaks have acquired Guillermo Mack from the waiver wire. |
| 1982-03-25 | The Oakland Canaries have promoted John Wilson to the major league team. The Oakland Canaries have designated Ed Thomas for assignment. The Oakland Canaries have designated Guillermo Mack for assignment. |
| 1981-07-25 | The Oakland Canaries have placed Guillermo Mack on the trade block. |
| 1975-07-06 | Guillermo Mack of the Oakland Canaries is injured and is expected to be out 12 days. |
| 1973-10-23 | A trade has been completed between the Oakland Canaries and the Toronto Antagonists. The Toronto Antagonists receive Martin Whelan, Draft Pick 1975 Round 2 OAK (Bob Sherling) from the Oakland Canaries in exchange for Guillermo Mack. |
| 1972-04-01 | The Toronto Antagonists have placed Guillermo Mack on the trade block. |
| 1970-03-25 | The Toronto Antagonists have promoted Guillermo Mack to the major league team. |
| 1969-10-09 | The Toronto Antagonists have sent Guillermo Mack to the minors. |
| 1969-03-25 | The Toronto Antagonists have promoted Allen Pulliam to the major league team. The Toronto Antagonists have promoted Guillermo Mack to the major league team. The Toronto Antagonists have promoted Boom-Boom Foster to the major league team. The Toronto Antagonists have designated Clarence Jones for assignment. |
| 1968-08-19 | The Toronto Antagonists have promoted Clarence Jones to the major league team. The Toronto Antagonists have promoted Glenn Tomanek to the major league team. The Toronto Antagonists have promoted Roberto Da Costa to the major league team. The Toronto Antagonists have sent Allen Pulliam to the minors. The Toronto Antagonists have sent Guillermo Mack to the minors. The Toronto Antagonists have sent Boom-Boom Foster to the minors. |
| 1967-07-16 | The Toronto Antagonists have promoted Guillermo Mack to the major league team. The Toronto Antagonists have sent Boom-Boom Foster to the minors. |
| 1967-06-21 | The Toronto Antagonists have promoted Carlton Wiffenmeister to the major league team. The Toronto Antagonists have sent Guillermo Mack to the minors. |
| 1966-09-02 | The Toronto Antagonists have promoted Jaime Roskos to the major league team. The Toronto Antagonists have promoted Boom-Boom Foster to the major league team. The Toronto Antagonists have promoted Guillermo Mack to the major league team. |