How PFF graded Brock Purdy, 49ers in wire-to-wire win over Seahawks

The 49ers' PFF grades show where they excelled the most in their dominant 31-13 win over the Seattle Seahawks on Thanksgiving evening. San Francisco's defense held quarterback Geno Smith and the Seahawks' offense to three first downs and 56 total yards in the first half. At the end of regulation, the Seahawks had only managed 14 first downs and 220 total net yards - 88 on the ground and 132 receiving. The 49ers' defense recorded 25 total pressures on Smith, who completed only 18 of his 27 attempts for 180 yards. The quarterback was sacked six times for 48 yards, reducing his net passing yards by over 26 percent. Brock Purdy did not manage a perfect passer rating as he did in Week 11, but outside of a pick-six at the beginning of the second half, had a productive day. The 49ers quarterback completed 21 of 30 attempts for 209 passing yards, an interception and a touchdown. "They got us on the disguise," Shanahan said of Purdy's pick-six. "They were doing some weird disguises which got us in a check. It was a double call. I shouldn't have put that on him. Obviously wasn't the check that we wanted. They got us with a disguise. Ended up getting that tip. "It was an unfortunate play,...