Brock Purdy isn't necessarily a product of Christian McCaffrey, but he's so much better when McCaffrey is on the field. When McCaffrey plays, Purdy's passer rating is 111.9 and his win-loss record is 18-4.

Brock Purdy, with a 5-0 record, has dominated the Seattle Seahawks more than any 49ers quarterback in history. Mind you, the Seahawks didn’t join the NFC West until 2002 realignment, but Purdy still is batting 1.

In his best game of the season -- Week 8 against the Dallas Cowboys -- Brock Purdy finished with 26.0 fantasy points. His stat line: 18-of-26 (69.2%), 260 yards, 1 TD, 0 INTs; 8 carries, 56 yards, 1 TD.

The quarterback has shown he can lead a team struggling with injuries, and now, with Christian McCaffrey back, San Francisco is at a turning point.

The Seattle Seahawks defense is, once again, struggling. There have been times this year where the unit has looked suffocating, especially with their pass rush. Unfortunately, there are other times where they are simply

Brock Purdy takes a 5-0 record against the Seahawks into Sunday’s game, while counterpart Geno Smith looks for his first win in six games against the Niners.