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 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.

Quarterbacks Brock Purdy and Geno Smith will be going head to head on Nov. 17, when the San Francisco 49ers (5-4) and Seattle Seahawks (4-5) meet at Levi's Stadium. In the piece below, we take a look at the numbers to decide which signal caller is more likely to take his team to victory.

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.