ฤดูกาลใดที่เล่นที่ Safeco Field พบกับทีม Boston Red Sox โดยมีการตัดสินเป็น L?ไม่จำเป็นต้องใช้โต๊ะทั้งหมด
What season was played at Safeco Field, against the Boston Red Sox, with a decision of L?It is not neccessary to use all the tables.
 table_63223:  "Season" [ text]  "Pitcher" [ text]  "Decision" [ text]  "Opponent" [ text]  "Location" [ text] 
SELECT "Season" FROM table_63223 WHERE "Location" = 'safeco field' AND "Decision" = 'l' AND "Opponent" = 'boston red sox'