Oregon State upsets No. 18 California, 23–20
It was unranked Oregon State taking down the No. 18 team in the AP poll.
Final23–20
Upset size4
Rank in 200531st of 63
It was the 3rd-biggest of 5 upsets in 2005 Week 7, and the 31st-biggest of the 2005 season. It was Oregon State's only upset win of 2005.
Other upsets in 2005 Week 7
Virginia 26, 
No. 4 Florida State 21Upset size11
Michigan 27, 
No. 8 Penn State 25Upset size9
West Virginia 46, 
No. 19 Louisville 44Upset size3.5
No. 23 Wisconsin 38, 
No. 22 Minnesota 34Upset size0.5
More: Oregon State upsets · California upsets · all Week 7 upsets · the 2005 season · how upset size works