John Sylvester boxer
- bouts
- 2
- won
- 0
- lost
- 2
- draw
- 0
- Status
- inactive
- Division
- -
- Debut
- 1915-10-22
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1920-01-27 | Gene Cline | WWWDWW | Porterville | LOST Points |
| 1915-10-22 | Battling Vierra | WLLDWW | Dreamland Rink, San Francisco | LOST KO |