... top five team has lost in each week. Week 1- 3 Oklahoma lost to BYU Week 2- 5 Oklahoma State lost to Houston Week 3- 3 USC lost to Washington Which top five team might be upset this week? Week 4 is the start of the Big 10 conference season, along with many other conference matchups. Iowa travels to Happy Valley, where the Nittany Lions are looking to avenge last year's loss and stay on track for a national championship. USC also looks to rebound from another stunning loss to a second level Pac 10 team.

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