KANSAS CITY, Mo. (AP) — The Chiefs won their first nine games a year ago, streaking toward the playoffs under new coach Andy Reid.They were the darlings of the NFL, its biggest surprise. Then they stumbled down the stretch and were beaten in the wild-card round by the Colts.Now, everything is reversed.After losing its first two games, including a one-sided rout at the hands of the hapless Titans, Kansas City is riding a wave of success. Reid and Co. have won four straight and six of their past seven, putting the pressure on the Broncos in the AFC West.They head into Sunday’s matchup with the defending Super Bowl champion Seahawks at Arrowhead Stadium as one of the NFL’s hottest teams.