What would a Sam Darnold reunion mean for the San Francisco 49ers, and should they trade QB Brock Purdy and roll with Darnold instead?

A look at the quarterback's strengths and shortcoming as the 49ers begin negotiating a new, multiyear contract.

"Brock Purdy's contract extension probably won't be nearly as expensive as it seems," Cohn said. "Had he been eligible for an extension last year when he was coming off a Super Bo