Modesto Concepcion boxer
- bouts
- 27
- won
- 8
- lost
- 16
- draw
- 3
- Status
- inactive
- Division
- lightweight
- Debut
- 1970-03-21
- Height
- 5′ 9″/175cm
- Reach
- -
- Age
- -
- Born
- -
- Death
- -
- Nationality
- Dominican Republic
| Date | Opponent | Last Opponents' Results | Place | Result |
|---|---|---|---|---|
| 1980-07-03 | Rodolfo Gonzalez | WWWWWW | Olympic Auditorium, Los Angeles | LOST KO |
| 1980-05-05 | Tyrone Rackley | WDLWWW | Civic Plaza, Phoenix | LOST Unanimous decision |
| 1980-02-14 | Gary Raymond | WLWWWW | Celebrity Theater, Phoenix | WIN Split-decision |
| 1979-09-13 | Leroy Haley | WWLDWW | Celebrity Theater, Phoenix | LOST Technical knockout |
| 1979-06-15 | Leroy Haley | WWWWL | Sahara Hotel, Las Vegas | DRAW |
| 1978-08-17 | Jose Dominguez | WWDDWW | Olympic Auditorium, Los Angeles | DRAW |
| 1978-05-15 | Sigfrido Rodriguez | WWWLLW | Civic Auditorium, Stockton | LOST Split-decision |
| 1978-01-17 | Miguel Estrada | LLDLLW | Silver Slipper, Las Vegas | WIN Unanimous decision |
| 1977-10-25 | Johnny Copeland | WLWDLL | Convention Center, Anaheim | WIN Unanimous decision |
| 1977-04-21 | Ramon Contreras | DWWWLW | Olympic Auditorium, Los Angeles | LOST KO |
| 1977-02-16 | Billy Turner | WWWWWW | Silver Slipper, Las Vegas | WIN KO |
| 1976-04-10 | Alexis Arguello | WWWWWW | Polideportivo Espana, Managua | LOST KO |
| 1976-02-17 | Bobby Chacon | WWLWLW | Civic Auditorium, San Jose | LOST Technical knockout |
| 1975-12-17 | Dale Hernandez | WWWWWW | Silver Slipper, Las Vegas | LOST Unanimous decision |
| 1975-10-22 | Tony Martinez | WLWWLL | Silver Slipper, Las Vegas | WIN Unanimous decision |
| 1975-10-15 | Manuel Leon | LLLDLL | Silver Slipper, Las Vegas | WIN Technical knockout |
| 1975-08-01 | Roy Holloway | LWLWWL | Tropicana Hotel & Casino, Las Vegas | WIN Technical knockout |
| 1975-05-08 | Roy Holloway | WLLLWL | Olympic Auditorium, Los Angeles | LOST Points |
| 1974-06-15 | Eleazar Delgado | LWLWW | Arena Coliseo, Mexico City | LOST Points |
| 1973-08-25 | Jose Torres | WWLWWL | Arena Mexico, Mexico City | LOST Technical knockout |
| 1971-05-29 | Danny Figueroa | WLLLDL | San Juan | LOST Points |
| 1970-10-31 | Samuel Serrano | WWWWWW | San Juan | LOST Points |
| 1970-08-25 | Ike Hooks | LWWWWW | Auditorium, Miami Beach | WIN Points |
| 1970-08-18 | Ike Hooks | WLWWWW | Auditorium, Miami Beach | LOST Points |
| 1970-05-09 | Samuel Serrano | WLWWWW | San Juan | LOST Points |
| 1970-04-11 | Fruto Rosa | LLLLWD | Hiram Bithorn Stadium, San Juan | LOST Points |
| 1970-03-21 | Fruto Rosa | LLLLW | San Juan | DRAW Points |