CREATE TABLE table_203_418 (id DECIMAL, "#" DECIMAL, "player" TEXT, "position" TEXT, "height" DECIMAL, "current club" TEXT)

what club has the most players ?
SELECT "current club" FROM table_203_418 GROUP BY "current club" ORDER BY COUNT("player") DESC LIMIT 1
SELECT "current club" FROM "table_203_418" GROUP BY "current club" ORDER BY COUNT("player") DESC NULLS LAST LIMIT 1