ตำแหน่งนักเตะมีกี่รอบ?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
How many rounds had a position of kicker?It is not neccessary to use all the tables.
 table_name_13:  (round [ INTEGER ] position [ VARCHAR) ]
SELECT SUM(round) FROM table_name_13 WHERE position = "kicker"