2. Cleveland broke the "Brock Purdy code"
Up until this past Sunday, no one was able to solve how to beat a Brock Purdy-led 49ers team during the regular season. More than a handful of teams had tried, but all ended up failing.
But then last week, the Cleveland Browns defense gave the rest of the NFL a blueprint on how to stop San Francisco's high-powered offense.
Against the Browns last Sunday, Purdy looked exactly how most former seventh-round draft picks should look, like he didn't belong on an NFL field.
Cleveland's defense was able to generate pressure consistently, getting in Purdy's face and causing him to think more than he normally would, which resulted in the young 49ers quarterback's worst performance of his career.
Vikings defensive coordinator Brian Flores will almost certainly be calling a ton of blitzes in this game. Flores is going to send pressure as much as possible in an attempt to throw Purdy off.
If Minnesota's defense can perform the way they did last week against Chicago, they will be in good shape to pull off the upset.