Winston Sierra boxer
- bouts
- 12
- won
- 3
- lost
- 9
- draw
- 0
- Status
- inactive
- Division
- featherweight
- Debut
- 1993-08-28
- Height
- -
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Panama
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| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1998-09-18 | Vicente Mosquera | WWWWW | Gimnasio Nuevo Panama, Panama City | LOST Unanimous decision |
| 1998-05-16 | Florentino Campbell | WWWWWW | Arena Panama Al Brown, Colon City | LOST Technical knockout |
| 1998-04-18 | Melquiades Mojica | WLWLWW | Gimnasio Kiwanis, Panama City | LOST |
| 1997-10-04 | Melquiades Mojica | WLWL | Gimnasio Chino-Panameno, Panama City | LOST Points |
| 1997-09-20 | Franklyn Valencia | debut | Gimnasio Kiwanis, Panama City | WIN KO |
| 1997-02-28 | Ubaldino Gutierrez | LDWWWL | Gimnasio Kiwanis, Panama City | LOST Technical knockout |
| 1996-11-03 | Hermogenes Mosquera | LWLLLL | Gimnasio de los Leones, Panama City | WIN KO |
| 1996-08-24 | Ubaldino Gutierrez | LLDWW | Hipodromo Presidente Remon, Panama City | LOST KO |
| 1996-04-20 | Fabian Salazar | LLLLWW | Hotel Washington, Colon City | LOST Points |
| 1994-02-05 | Reinhold Campa | WLWWWW | Gimnasio Nuevo Panama, Panama City | LOST Points |
| 1993-12-28 | Reinhold Campa | WLWWW | Gimnasio Nuevo Panama, Panama City | LOST Points |
| 1993-08-28 | Johnny Santos | debut | Gimnasio Nuevo Panama, Panama City | WIN Technical knockout |