The San Francisco 49ers run a quarterback-friendly offense, but Trent Williams wants to make it known that Brock Purdy isn't a system quarterback.

"I don't get why people say he's a system quarterback," the star left tackle said. "... No system quarterback makes tight-window throws before they're there, throwing people open, putting the ball into a window and trusting his receiver to get there, layering balls over linebackers who are in good position, and still getting the ball over their head, getting it to the playmaker.

"(He's) just so accurate. You watch a lot of his throws, the accuracy gives them guys a chance to run after the catch, and I don't think he gets enough credit for that."

Purdy tossed for a career-high 368 yards in Week 14.