Bob Thomas booted a pair of field goals and Walter Payton rushed for 125 yards on 36 carries in 80 degree heat as the Bears won their opener. Thomas who had a field goal attempt blocked by Packers' Mike Hunt in the first quarter converted from 25 and 19 yards in the second quarter and the Bears banked on an aggressive defense which was credited with five sacks for the triumph. Chester Marcol, who had a field goal blocked by Virgil Livers, later connected for Green Bay's only score with a 28 yarder. The Bears defense aided by a pair of excellent punts by Bob Parsons, kept the Packers in tough field condition in the first half when Green Bay was limited to only three first downs.