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_97 (pick INTEGER, position VARCHAR, round VARCHAR)

### Question ###
What is the pick number for the player playing tackle position, and a round less than 15?

### Accurate SQL ###

SELECT SUM(pick) FROM table_name_97 WHERE position = "tackle" AND round < 15