Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_2508633_8 (pick__number INTEGER, nfl_team VARCHAR)

### Question ###
what is the pick number minimum if the NFL team is the San Diego Chargers?

### Accurate SQL ###

SELECT MIN(pick__number) FROM table_2508633_8 WHERE nfl_team = "San Diego Chargers"