CREATE TABLE table_71273 ("Date" CLOB, "Opponent" CLOB, "Score" CLOB, "Loss" CLOB, "Attendance" CLOB, "Record" CLOB)

Who did the Blue Jays play against on April 11?
SELECT "Opponent" FROM table_71273 WHERE "Date" = 'april 11'
SELECT "Opponent" FROM "table_71273" WHERE "Date" = 'april 11'