CREATE TABLE table_name_57 (round INTEGER, college VARCHAR, overall VARCHAR)
SELECT AVG(round) FROM table_name_57 WHERE college = "stanford" AND overall < 8
รอบใดมีวิทยาลัยสแตนฟอร์ด และคะแนนรวมน้อยกว่า 8
Which Round has a College of stanford, and an Overall smaller than 8?