CREATE TABLE table_72099 ("Year" FLOAT, "Division" TEXT, "League" TEXT, "Regular Season" TEXT, "Playoffs" TEXT, "U.S. Open Cup" TEXT)

what are all the playoffs for regular season is 1st, atlantic division
SELECT "Playoffs" FROM table_72099 WHERE "Regular Season" = '1st, Atlantic Division'
SELECT "Playoffs" FROM "table_72099" WHERE "Regular Season" = '1st, Atlantic Division'