Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_99 (pick__number INTEGER, overall VARCHAR, position VARCHAR)
### Question:
What is the highest pick number of a defensive back with less than 136 overall points?
### Answer:
SELECT MAX(pick__number) FROM table_name_99 WHERE overall < 136 AND position = "defensive back"