CREATE TABLE table_57210 ("Pick" FLOAT, "Round" FLOAT, "Player" CLOB, "Position" CLOB, "School" CLOB)

What was the lowest round that Melvin Johnson played?
SELECT MIN("Round") FROM table_57210 WHERE "Player" = 'melvin johnson'
SELECT MIN("Round") FROM "table_57210" WHERE "Player" = 'melvin johnson'