Brock Purdy, the QB for the San Francisco 49ers, is listed as questionable for Sunday's game against Cincinnati due to a concussion. However, coach Kyle Shanahan is optimistic that Purdy will clear concussion protocol and start the game. Purdy has made rapid progress and participated fully in practice on Friday. He will need clearance from an independent neurologist, which Shanahan expects to happen on Saturday. If Purdy isn't cleared, Sam Darnold will start as the QB for the 49ers.