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| Name | Team | Age |
| Junior Leonard | Retired (1991, Age 36) | Died (2024, Age 69) |
| Drafted | Position | Bats/Throws |
| Round 2, Pick 21 (1977) |
RP | R/R |
| League | Option Years
|
Majors Service Time |
| Mike Piazza League | 0 | 12 years (23 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 | 4/16/1955 | |
| WS Rings | WS Appearances | LCS Appearances |
| 0 | 2 | 5 |
| 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 |
| Date | Transaction |
| 1991-11-01 | Junior Leonard has retired from the Seattle Mariners |
| 1990-08-14 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 30 days. |
| 1986-08-28 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 20 days. |
| 1983-07-13 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 15 days. |
| 1983-05-27 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 23 days. |
| 1983-04-16 | The Seattle Mariners have promoted Junior Leonard to the major league team. The Seattle Mariners have sent Mike Leek to the minors. |
| 1982-10-03 | The Seattle Mariners have promoted Dick Landrum to the major league team. The Seattle Mariners have sent Junior Leonard to the minors. |
| 1982-04-08 | The Seattle Mariners have promoted Junior Leonard to the major league team. The Seattle Mariners have designated Rich Tracewski for assignment. |
| 1982-04-08 | The Seattle Mariners have sent Junior Leonard to the minors. |
| 1981-09-30 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 20 days. |
| 1980-08-20 | Junior Leonard of the Seattle Mariners is injured and is expected to be out 34 days. |
| 1979-08-23 | The Seattle Mariners have promoted Junior Leonard to the major league team. The Seattle Mariners have sent Dick Landrum to the minors. |
| 1979-08-16 | The Seattle Mariners have promoted Dick Landrum to the major league team. The Seattle Mariners have sent Junior Leonard to the minors. |
| 1979-06-21 | The Seattle Mariners have promoted Junior Leonard to the major league team. |
| 1979-03-25 | The Seattle Mariners have acquired Junior Leonard from the waiver wire. |
| 1977-08-06 | The Montreal Maroons have waived Junior Leonard. |