Sergio Alonso boxer
- bouts
- 4
- won
- 1
- lost
- 3
- draw
- 0
- Status
- inactive
- Division
- featherweight
- Debut
- 1989-08-17
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- USA
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1991-01-31 | James Page | WW | Fairmont Hotel, San Jose | LOST KO |
| 1991-01-15 | Steve Romero | WWWWWL | Bally's Hotel & Casino, Reno | LOST Unanimous decision |
| 1990-03-15 | Javier Torres | LLLLL | Long Beach | WIN Points |
| 1989-08-17 | Rogelio Perez | WLLLLD | San Diego | LOST Points |