John Koslowski boxer
- bouts
- 24
- won
- 11
- lost
- 9
- draw
- 4
- Status
- inactive
- Division
- lightweight
- Debut
- 1923-05-14
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1929-03-25 | Johnny Sacco | LWLWWL | Convention Hall, Rochester | LOST Points |
| 1929-02-26 | Frankie Stellmack | LDLWLW | Public Hall, Cleveland | LOST Points |
| 1926-12-06 | Ray Romney | LLLLLL | Convention Hall, Rochester | LOST Points |
| 1926-11-15 | Joe Hall | WWWWLL | Convention Hall, Rochester | WIN Points |
| 1926-01-04 | Battling Barry | LLLLDL | Convention Hall, Rochester | WIN Points |
| 1925-05-22 | Johnny Kid Blair | LLWDDW | Arena, Syracuse | LOST Points |
| 1925-05-18 | Joe Trippe | LWWLWD | Convention Hall, Rochester | LOST Points |
| 1925-03-27 | Tommy Mitchell | WWLLWD | Arena, Syracuse | LOST Points |
| 1925-03-23 | Joe Trippe | LLLLWW | Convention Hall, Rochester | WIN Points |
| 1925-03-02 | Ben Romney | debut | Elmwood Music Hall, Buffalo | WIN Points |
| 1925-01-19 | Battling Barry | DDWWLD | Convention Hall, Rochester | DRAW Points |
| 1924-05-12 | Charlie Thompson | LWDDLW | Broadway Auditorium, Buffalo | WIN Points |
| 1924-04-14 | Johnny Sacco | WLDDDW | Broadway Auditorium, Buffalo | LOST Points |
| 1924-03-31 | Johnny Sacco | WWLDD | Broadway Auditorium, Buffalo | DRAW Points |
| 1924-03-17 | Charlie Thompson | WLWDD | Broadway Auditorium, Buffalo | WIN Technical knockout |
| 1924-01-01 | Battling Barry | DWLDDD | Convention Hall, Rochester | DRAW Points |
| 1923-12-10 | Frankie Mack | DDWLWL | Broadway Auditorium, Buffalo | DRAW Points |
| 1923-12-03 | Art Wander | WWLDLL | Rochester | WIN Points |
| 1923-11-05 | Buddy Ridley | LWLDDW | Broadway Auditorium, Buffalo | LOST Points |
| 1923-10-22 | Tony Vincent | DLLDLL | Convention Hall, Rochester | WIN Points |
| 1923-10-08 | Young Coogan | LWLLLL | Convention Hall, Rochester | WIN Points |
| 1923-09-21 | Billy Burke | LLWL | Convention Hall, Rochester | WIN Points |
| 1923-05-28 | Ralph Morocco | LLLLLL | Rochester | LOST Points |
| 1923-05-14 | Jack Farrell | WLWL | Convention Hall, Rochester | WIN KO |