CLEVELAND (AP) — Baker Mayfield is out front in the Browns’ playoff run. The third-year quarterback has displayed composure on and off the field while helping Cleveland advance to the AFC’s second round where the Browns will face the reigning Super Bowl champion Kansas City Chiefs on Sunday. Mayfield is playing at a high level with 19 touchdown passes and one interception in his last 10 games. Outside the lines he’s been equally solid. On Thursday, he said he didn’t have a problem with a tweet by Chiefs wide receiver Sammy Watkins, who inferred the Browns wouldn’t be much competition. In the past, Mayfield might have shot back.