CREATE TABLE table_63223 ("Season" TEXT, "Pitcher" TEXT, "Decision" TEXT, "Opponent" TEXT, "Location" TEXT)

What season was played at Safeco Field, against the Boston Red Sox, with a decision of L?
SELECT "Season" FROM table_63223 WHERE "Location" = 'safeco field' AND "Decision" = 'l' AND "Opponent" = 'boston red sox'
SELECT "Season" FROM "table_63223" WHERE "Decision" = 'l' AND "Location" = 'safeco field' AND "Opponent" = 'boston red sox'