Brock Purdy and the San Francisco 49ers overcame a tough Dallas Cowboys defense with a 19-12 win in the Bay Area. Purdy finished 19-of-29 for 214 yards and an 87.4 passer rating. Mr. Irrelevant now faces his biggest challenge yet: the Philadelphia Eagles on the road. Colin Cowherd predicts how Purdy will perform against a tough team and crowd.