Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Result | Record | Opponent | Method | Date | Round | Notes |
| --- | --- | --- | --- | --- | --- | --- |
| Win | 1-0-0 | Tony "Swamp Rat" Santaigo | Knockout | 1980 Dec 31 | 1.0 | Kickboxing |
| Win | 2-0-0 | Tony "Swamp Rat" Santaigo | Knockout | 1981 | 1.0 | Kickboxing |
| Win | 3-0-0 | Tony "Swamp Rat" Santaigo | Knockout | 1981 | 1.0 | Kickboxing |
| Win | 4-0-0 | Tony "Swamp Rat" Santiago | Knockout | 1981 | 1.0 | Kickboxing |
| Win | 5-0-0 | Alberto Rodriguez | Knockout | 1982 | 1.0 | Kickboxing |
| Win | 6-0-0 | Manny Morales | Knockout | 1987 | 2.0 | Kickboxing |
| Win | 7-0-0 | Sherman Bergman | Knockout | 1989 May 7 | 2.0 | Kickboxing |
| Loss | 7-1-0 | Sherman Bergman | Knockout | 1990 | 1.0 | Kickboxing |
| Loss | 7-2-0 | Sherman Bergman | Knockout | 20 May 1990 | 1.0 | Kickboxing |
| Loss | 7-3-0 | Sherman Bergman | Knockout | 15 July 1990 | 1.0 | Kickboxing |
Question:
How did he beat Alberto Rodriguez?
Answer:
Knockout