The momentum built up by the Chicago Bears from a strong week of practice and shutout victory over the Buffalo Bills quickly vanished Friday night during the team's third preseason game in Kansas City.

A game that ended with a dramatic walk-off touchdown when the Bears' backups thundered back from a 17-point second-half deficit to beat the Chiefs 29-27 started in a way that irked coach Ben Johnson.

"Offensively, the first two possessions was really sloppy football that has plugged us in and out of camp so far, and unfortunately that's what we got here tonight," Johnson said.

Quarterback Caleb Williams and the offensive starters played 27 snaps over two full quarters in the Bears' preseason finale at GEHA Field at Arrowhead Stadium.

Chicago's first two drives netted 22 total yards

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