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_12 ( round INTEGER, player VARCHAR, pick__number VARCHAR )

### Question ###
Which the highest Round has a Player of mike williams, and a Pick # larger than 4?

### Accurate SQL ###

SELECT MAX(round) FROM table_name_12 WHERE player = "mike williams" AND pick__number > 4