CREATE TABLE table_15778 ("Week" FLOAT, "Date" CLOB, "Opponent" CLOB, "Result" CLOB, "Game site" CLOB, "Record" CLOB, "Attendance" CLOB)

Who is the opponent the Seattle Seahawks played when their record was 1-3?
SELECT "Opponent" FROM table_15778 WHERE "Record" = '1-3'
SELECT "Opponent" FROM "table_15778" WHERE "Record" = '1-3'