Johnny Koster boxer
- bouts
- 9
- won
- 4
- lost
- 5
- draw
- 0
- Status
- inactive
- Division
- heavyweight
- Debut
- 1946-04-23
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1949-04-01 | Joe Mack | WLLLLL | Coliseum, San Diego | LOST Technical knockout |
| 1947-10-28 | Tommy Jessen | DDWWWW | Olympic Auditorium, Los Angeles | LOST Technical knockout |
| 1947-07-08 | Jack Warren | WDLWD | Olympic Auditorium, Los Angeles | LOST Technical knockout |
| 1947-05-27 | Bob Scott | LLLLLL | Olympic Auditorium, Los Angeles | WIN Points |
| 1947-03-28 | Roland Spencer | DLWWWD | Legion Stadium, Hollywood | LOST Points |
| 1947-03-18 | Sammy Smith | L | Olympic Auditorium, Los Angeles | WIN KO |
| 1947-01-28 | Willie Bean | DL | Olympic Auditorium, Los Angeles | LOST Technical knockout |
| 1946-05-20 | Carmen Fredericks | WWWWLW | Ocean Park Arena, Santa Monica | WIN KO |
| 1946-04-23 | Hank Morris | LLWWLL | Olympic Auditorium, Los Angeles | WIN Technical knockout |