KANSAS CITY -

Sean Smith and Malcolm Bronson returned interceptions for touchdowns, De'Anthony Thomas brought back a punt 80 yards for another score and the Kansas City Chiefs beat the Cincinnati Bengals 41-39 in their preseason opener Thursday night.
 
Andy Dalton was sharp in his only series for the Bengals after signing a new six-year deal this week. He hit wide receiver A.J. Green for a 53-yard pass to set up the opening field goal.
 
He quickly gave way to backup Jason Campbell, who was just 6 of 15 for 72 yards. And while he threw a pair of touchdown passes, he also was responsible for the pick-6s by Smith and Bronson before getting banged up midway through the third quarter.
 

The Bengals' Dre Kirkpatrick also returned an interception for a touchdown.