Johnny Demko boxer
- bouts
- 15
- won
- 5
- lost
- 9
- draw
- 1
- Status
- inactive
- Division
- middleweight
- Debut
- 1929-06-11
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1932-06-20 | KO Crom | WWLLWW | Moxahala Park, Zanesville | LOST Technical knockout |
| 1932-05-26 | Gene Marsh | WLWWWL | Harding Stadium, Steubenville | LOST Points |
| 1932-05-04 | Tony Rubino | WWLW | Rayen-Wood Auditorium, Youngstown | LOST KO |
| 1932-04-18 | Mickey Burns | LLDL | War Memorial Building, Steubenville | WIN KO |
| 1931-10-19 | Anson Green | LDWLWW | Motor Square Garden, Pittsburgh | LOST KO |
| 1931-03-02 | Sammy Madison | WL | Wheeling | LOST Points |
| 1931-01-12 | Sammy Madison | W | Wheeling | WIN Points |
| 1930-11-07 | Freddie Edwards | WWLWLW | East Liverpool | LOST Technical knockout |
| 1930-09-18 | Anson Green | debut | Palisades Rink, McKeesport | WIN Points |
| 1930-04-07 | Russell Powers | W | Motor Square Garden, Pittsburgh | LOST Technical knockout |
| 1930-03-27 | Young Rudy | LWWWLL | Palisades Rink, McKeesport | LOST KO |
| 1930-03-25 | Joe Corelli | LLLLWW | East Liverpool | WIN Technical knockout |
| 1930-02-11 | Harry Devore | LLWDLD | East Liverpool | WIN Points |
| 1930-01-23 | Harry Devore | WLLWDL | East Liverpool | DRAW Points |
| 1929-11-18 | Johnny Morgan | WWW | Kincaid's Garden, Steubenville | LOST Technical knockout |
| 1929-06-11 | Eddie Littlejohn | debut | North End Baseball Park, Steubenville | DRAW |
