CREATE TABLE table_38371 ("Date" TEXT, "Opponent" TEXT, "Score" TEXT, "Loss" TEXT, "Stadium" TEXT, "Attendance" FLOAT, "Record" TEXT)

Who was the opponent on April 28?
SELECT "Opponent" FROM table_38371 WHERE "Date" = 'april 28'
SELECT "Opponent" FROM "table_38371" WHERE "Date" = 'april 28'