They beat a good New York Giants team, and a good Kansas City Cheifs team. You, of all people, should know how good KC can be. They also beat the Rams, who are a dangerous team. And yes, the beat Oakland. They also went to OT against San Diego.
Besides, they could very easily end up at 11-5, after going 2-2 against the toughest division in football, and sweeping their own division.