CREATE TABLE table_38314 ("Season" TEXT, "Tier" FLOAT, "Division" TEXT, "Pos." FLOAT, "Postseason" TEXT, "Cup Competitions" TEXT)

Which Season has a Postseason of promoted runner-up?
SELECT "Season" FROM table_38314 WHERE "Postseason" = 'promoted runner-up'
SELECT "Season" FROM "table_38314" WHERE "Postseason" = 'promoted runner-up'