Is Brock Purdy's Production Sustainable?

It's entirely conceivable that he will finish the season with the best passer rating in the NFL.

Statistically, Brock Purdy is the most efficient quarterback in the NFL this season.

He leads all quarterbacks with a pristine passer rating of 123.1. He has thrown 9 touchdown passes and 0 interceptions. He has completed 72.1 percent of his throws. And he has won all of his starts.

Can Purdy keep up his current level of production?

Clearly, he'll throw an interception eventually. But it's entirely conceivable that he will finish the season with the best passer rating in the NFL and perhaps the best completion percentage, too. He's good, he fits the system perfectly, the system is excellent and the supporting cast is outstanding.

As long as Christian McCaffrey, Brandon Aiyuk, Deebo Samuel, George Kittle and Kyle Juszczyk are healthy, Purdy will be tough to stop, because he reads defenses so quickly and always finds the open man. And there's always an open man on the field when Kyle Shanahan is drawing up the plays for those playmakers.

Very few if any defenses in the NFL have enough talented players to cover all the 49ers offensive weapons. That's a big reason why Purdy's numbers are off the charts.

But the 49ers still have one relative weakness, or at least something that isn't a strength -- their offensive line. It's serviceable. It punches above its weight. But it can get pushed around by big defensive lines like the one in Philadelphia. Remember, the Eagles knocked out not one but two 49ers quarterbacks in the NFC Championship Game.

The only way to slow down Purdy and the 49ers offense is to pressure him constantly. Not many teams can pull that off -- the Cowboys sure couldn't. The Eagles might be able to. We'll find out in Week 13 when these teams face each other.