# Rigoberto Riasco

Rigoberto Riasco (11 January 1953 – 29 August 2022) also known as "Little Poison", was a Panamanian professional boxer who competed from 1968 to 1982. He was the Lineal and WBC Super bantamweight champion in 1976. Riasco defeated such men as Dong Kyun Yum, Leonel Hernández, Rafael Ortega, Waruinge Nakayama, Luis Ávila, Santos Luis Rivera, Seiji "Flipper" Uehara, and Sanjo Takemori.

## Professional boxing career

Riasco made his professional debut on 25 August 1968 with a four-round draw with Carlos Mendoza and after winning the featherweight national championship, he fought Alexis Argüello, who defeated him with a second round technical knockout.
After his defeat, he defeated previously unbeaten Luis Ávila and Puerto Rican Santos Luis Rivera, who had knocked him out in the first round in Puerto Rico. Those victories earned him the chance to fight for the newly created WBC championship belt.
On 3 April 1976, Riasco defeated Kenyan Waruinge Nakayama for the WBC and Lineal Super bantamweight titles. He made two successful defenses against Livio Nolasco and Dong Kyun Yum before losing his belt in his third defense against Japanese Royal Kobayashi in Tokyo on October 9, 1976.
He announced his retirement in 1981, but returned later. After three consecutive defeats, Riasco officially announced his retirement in 1982. He left with a record of 29 wins with 13 KOs, 9 losses, and 4 draws.

## Professional boxing record

| 40 fights | 26 wins | 9 losses |
| By knockout | 13 | 4 |
| By decision | 13 | 4 |
| By disqualification | 0 | 1 |
| Draws | 4 | 4 |
| No contests | 1 | 1 |
| No. | Result | Record | Opponent | Type | Round, time | Date | Location | Notes |
| 40 | Loss | 26–9–4 (1) | Mário Miranda | KO | 4 (12) | Mar 19, 1982 | Plaza de Toros de Cartagena de Indias, Cartagena, Colombia | For WBC Continental Americas featherweight title |
| 39 | Loss | 26–8–4 (1) | Carlos Núñez | DQ | 9 (10) | Jan 16, 1982 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 38 | Loss | 26–7–4 (1) | Il Yang | PTS | 10 | Dec 19, 1981 | Seoul, South Korea | |
| 37 | Win | 26–6–4 (1) | Jose Santana | PTS | 10 | Aug 15, 1981 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 36 | Win | 25–6–4 (1) | Pascual Patterson | MD | 10 | Jul 25, 1981 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 35 | Loss | 24–6–4 (1) | Kazuo Kobayashi | KO | 8 (15) | Oct 9, 1976 | Kuramae Kokugikan, Tokyo, Japan | Lost WBC super-bantamweight title |
| 34 | Win | 24–5–4 (1) | Yum Dong-kyun | SD | 15 | Aug 1, 1976 | Busan Stadium, Busan, South Korea | Retained WBC super-bantamweight title Referee Rosadilla was reportedly assaulted after the bout, and forced to reverse his decision to favor Yum |
| 33 | Win | 23–5–4 (1) | Livio Nolasco | TKO | 10 (15) | Jun 12, 1976 | Gimnasio Nuevo Panama, Panama City, Panama | Retained WBC super-bantamweight title |
| 32 | Win | 22–5–4 (1) | Waruinge Nakayama | RTD | 8 (15) | Apr 3, 1976 | Gimnasio Nuevo Panama, Panama City, Panama | Won inaugural WBC super-bantamweight title |
| 31 | Win | 21–5–4 (1) | Santos Luis Rivera | TKO | 7 (10) | Nov 15, 1975 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 30 | Win | 20–5–4 (1) | Luis Ávila | UD | 12 | Aug 23, 1975 | Gimnasio Nuevo Panama, Panama City, Panama | Retained Panamanian featherweight title |
| 29 | Loss | 19–5–4 (1) | Alexis Argüello | TKO | 2 (15) | May 31, 1975 | Estadio Flor de Cana, Granada, Nicaragua | For WBA & vacant The Ring featherweight titles |
| 28 | Win | 19–4–4 (1) | Raul Silva | TKO | 10 (10) | Mar 9, 1975 | Gimnasio Orlando Winter, Panama City, Panama | |
| 27 | Win | 18–4–4 (1) | Nestor Herrera | TKO | 1 (?) | Feb 19, 1975 | Caracas, Venezuela | |
| 26 | Win | 17–4–4 (1) | Renan Marota | UD | 10 | Jan 25, 1975 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 25 | Win | 16–4–4 (1) | Flipper Uehara | PTS | 10 | Oct 21, 1974 | Korakuen Hall, Tokyo, Japan | |
| 24 | Draw | 15–4–4 (1) | Sanjo Takemori | PTS | 10 | Jun 24, 1974 | Japan | |
| 23 | Win | 15–4–3 (1) | Jesus Estrada | TKO | 4 (10) | May 11, 1974 | Monterrey, Mexico | |
| 22 | Win | 14–4–3 (1) | Kid Clay | PTS | 10 | Mar 2, 1974 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 21 | Win | 13–4–3 (1) | Rafael Ortega | UD | 12 | Dec 15, 1973 | Gimnasio Nuevo Panama, Panama City, Panama | Retained Panamanian featherweight title |
| 20 | Win | 12–4–3 (1) | Vicente Blanco | TKO | 6 (10) | Sep 14, 1973 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 19 | Loss | 11–4–3 (1) | Santos Luis Rivera | KO | 1 (10) | Aug 4, 1973 | Roberto Clemente Coliseum, San Juan, Puerto Rico | |
| 18 | Win | 11–3–3 (1) | Leonel Hernandez | UD | 10 | Jun 2, 1973 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 17 | Win | 10–3–3 (1) | Jose Angel Herrera | SD | 10 | May 3, 1973 | Olympic Auditorium, Los Angeles, California, U.S. | |
| 16 | Win | 9–3–3 (1) | Miguel Espinosa | PTS | 10 | Nov 18, 1972 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 15 | Win | 8–3–3 (1) | Enrique Alonso | KO | 4 (12) | Oct 28, 1972 | Gimnasio Nuevo Panama, Panama City, Panama | Won vacant Panamanian featherweight title |
| 14 | Win | 7–3–3 (1) | Alberto Herrera | TKO | 5 (10) | Aug 18, 1972 | Guayaquil, Ecuador | |
| 13 | Loss | 6–3–3 (1) | Enrique Alonso | UD | 10 | Apr 29, 1972 | Arena de Colon, Colón, Panama | |
| 12 | Loss | 6–2–3 (1) | Jose Luis Meza | UD | 10 | Jan 30, 1971 | Arena México, Mexico City, Mexico | |
| 11 | Win | 6–1–3 (1) | Francisco Amaro | TKO | 6 (10) | Nov 24, 1970 | Jai Alai Frontón Palacio, Tijuana, Mexico | |
| 10 | Loss | 5–1–3 (1) | Jorge Reyes | PTS | 10 | Oct 10, 1970 | Mexico City, Mexico | |
| 9 | Win | 5–0–3 (1) | Humberto Arboleda | TKO | 3 (6) | May 24, 1970 | Gimnasio Nuevo Panama, Panama City, Panama | |
| 8 | Win | 4–0–3 (1) | Carlos Mendoza | KO | 6 (6) | Dec 13, 1969 | Arena de Colon, Colón, Panama | |
| 7 | Draw | 3–0–3 (1) | Enrique Warren | PTS | 6 | Oct 5, 1969 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 6 | NC | 3–0–2 (1) | Catalino Alvarado | NC | 4 (6) | Aug 10, 1969 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 5 | Win | 3–0–2 | Manuel Jimenez | UD | 4 | Mar 2, 1969 | Estadio Juan Demóstenes Arosemena, Panama City, Panama | |
| 4 | Draw | 2–0–2 | Manuel Jimenez | PTS | 4 | Feb 9, 1969 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 3 | Win | 2–0–1 | Manuel Jimenez | KO | 1 (4) | Dec 15, 1968 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 2 | Win | 1–0–1 | Santos Pena | UD | 4 | Nov 30, 1968 | Gimnasio Neco de la Guardia, Panama City, Panama | |
| 1 | Draw | 0–0–1 | Carlos Mendoza | PTS | 4 | Aug 25, 1968 | Gimnasio Neco de la Guardia, Panama City, Panama | |

## Death

Riasco died on August 22, 2022, at the age of 69.