Brock Purdy enters Week 5 of the 2026 NFL season on a scorching pace with 11 passing touchdowns through four games, leading the league while posting a 126.2 passer rating, 69.9% completion rate, and zero sacks allowed in Kyle Shanahan’s efficient West Coast scheme. The 49ers’ 4-0 start reflects strong early-down efficiency, red-zone execution, and Purdy’s mobility (122 rushing yards), even amid injuries to key pieces like receivers and the offensive line. A stiff test awaits against the Seahawks’ top-ranked defense at Lumen Field, where pressure rates and physicality could force regression from his current touchdown rate. Over the remaining schedule, factors such as continued protection, receiver availability, opponent defensive strength, and Purdy’s health will shape his final regular-season total in what remains a high-variance projection for a full 17-game slate.