They followed it up by forcing three turnovers in a 44-41 upset at Pittsburgh, then had eight sacks and forced three more turnovers in a 23-3 victory over Mountain West champion San Jose State on Saturday at Waldo Stadium. The Broncos began their winning streak by limiting FCS opponent Illinois State to 57 total yards in a 28-0 win. Western Michigan will be carrying a three-game winning streak into its Mid-American Conference opener at Buffalo on Saturday, entering the game with a defense that shows it can cause havoc.