CREATE TABLE table_28313 ("Rank" FLOAT, "Player" TEXT, "Year" FLOAT, "Opponent" TEXT, "Passing yards" FLOAT, "Rushing yards" FLOAT, "Total offense" FLOAT)

Who was the opponent when Devin Gardner was the player?
SELECT "Opponent" FROM table_28313 WHERE "Player" = 'Devin Gardner'
SELECT "Opponent" FROM "table_28313" WHERE "Player" = 'Devin Gardner'