CREATE TABLE table_57182 ("Round" FLOAT, "Pick" FLOAT, "Player" TEXT, "Pos." TEXT, "Nationality" TEXT, "Team" TEXT, "School/club team" TEXT)

How many rounds have a Pick of 13?
SELECT SUM("Round") FROM table_57182 WHERE "Pick" = '13'
SELECT SUM("Round") FROM "table_57182" WHERE "Pick" = '13'