CREATE TABLE table_49766 ("Round" FLOAT, "Pick" FLOAT, "Player" TEXT, "Position" TEXT, "School/Club Team" TEXT)

Which player was defensive back after round 3?
SELECT "Player" FROM table_49766 WHERE "Position" = 'defensive back' AND "Round" > '3'
SELECT "Player" FROM "table_49766" WHERE "Position" = 'defensive back' AND "Round" > '3'