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_name_89 ( total_goals INTEGER, position VARCHAR, fa_cup_goals VARCHAR )

### Question ###
What is the lowest total goals when position is df, and FA Cup Goals is smaller than 0?

### Accurate SQL ###

SELECT MIN(total_goals) FROM table_name_89 WHERE position = "df" AND fa_cup_goals < 0