Young John Mayo boxer
- bouts
- 14
- won
- 5
- lost
- 8
- draw
- 0
- Status
- inactive
- Division
- welterweight
- Debut
- 1922-07-14
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1928-12-25 | Gene Buffalo | WWWWL | Cambria A.C., Philadelphia | LOST KO |
| 1928-12-07 | Bill Kent | LLWDLL | Cambria A.C., Philadelphia | WIN Points |
| 1928-11-16 | Billy Cantz | WLLWDL | Cambria A.C., Philadelphia | LOST Points |
| 1928-04-20 | Ivan Monaghan | W | Cambria A.C., Philadelphia | WIN Points |
| 1928-03-29 | Johnny Peppe | WL | Auditorium, Wilmington | DRAW |
| 1928-03-15 | Johnny Peppe | debut | Auditorium, Wilmington | LOST |
| 1928-03-02 | Eddie Clover | WLLLLL | Cambria A.C., Philadelphia | WIN Points |
| 1925-06-29 | Frankie Evans | LLLWLL | Carnival Park, West Manayunk | LOST Points |
| 1925-03-27 | Battling Spages | debut | Cambria A.C., Philadelphia | NC No Contest |
| 1925-03-06 | Frankie Evans | LWLLLW | Cambria A.C., Philadelphia | WIN Points |
| 1925-01-09 | Terry Ferguson | LLWW | Cambria A.C., Philadelphia | LOST Points |
| 1924-05-02 | Johnny Barocol | debut | Cambria A.C., Philadelphia | WIN Points |
| 1923-11-23 | Vic Stanley | L | Cambria A.C., Philadelphia | LOST KO |
| 1923-11-02 | Joe Koons | LLWLLL | Cambria A.C., Philadelphia | LOST KO |
| 1923-01-19 | Frank O'Rourke | W | Cambria A.C., Philadelphia | LOST |
| 1922-12-15 | Pat Haley | WLWLWW | Cambria A.C., Philadelphia | LOST Technical knockout |
| 1922-08-17 | Jack Rawlins | debut | Logan A.C., Philadelphia | LOST |
| 1922-07-14 | Willie McGovern | DWWWWD | Cambria A.C., Philadelphia | LOST KO |
