CREATE TABLE table_8621 ("Round" FLOAT, "Pick" FLOAT, "Overall" FLOAT, "Name" TEXT, "Position" TEXT, "College" TEXT)

What is the highest round that has an overall of 143 and a pick greater than 6?
SELECT MAX("Round") FROM table_8621 WHERE "Overall" = '143' AND "Pick" > '6'
SELECT MAX("Round") FROM "table_8621" WHERE "Overall" = '143' AND "Pick" > '6'