Joao Mackay boxer
- bouts
- 4
- won
- 0
- lost
- 4
- draw
- 0
- Status
- inactive
- Division
- welterweight
- Debut
- 1935-01-20
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Brazil
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1936-08-22 | Placido Silva | WWWL | Estádio Brasil, Porto Alegre | LOST Points |
| 1935-09-27 | Eduardo Rittes | debut | Estádio Paysandú, Porto Alegre | LOST Points |
| 1935-02-03 | Ary Maldonado | L | Estádio Paysandú, Porto Alegre | LOST Points |
| 1935-01-20 | Joao Tavares Crespo | WLWDW | Estádio Paysandú, Porto Alegre | LOST Technical knockout |