CREATE TABLE table_203_577 (id DECIMAL, "tenure" TEXT, "coach" TEXT, "years" DECIMAL, "record" TEXT, "pct." DECIMAL)

who was coach after b.l. noojin ?
SELECT "coach" FROM table_203_577 WHERE "tenure" > (SELECT "tenure" FROM table_203_577 WHERE "coach" = 'b. l. noojin') ORDER BY "tenure" LIMIT 1
SELECT "coach" FROM "table_203_577" WHERE "tenure" > (SELECT "tenure" FROM "table_203_577" WHERE "coach" = 'b. l. noojin') ORDER BY "tenure" NULLS FIRST LIMIT 1