Sam Darnold: Grasping offense "a work in progress," excited to continue in training camp

As long as Brock Purdy remains in rehab mode for his elbow, the 49ers will have a competition between Trey Lance and Sam Darnold for the starting quarterback job.The 49ers acquired Lance with the third overall pick of the 2021 draft, so he has spent three years with head coach Kyle Shanahan in the team's offensive system. Darnold was with the Jets and Panthers before signing with the 49ers this offseason, so he's had to get a handle on the offense while also trying to show that he can run it we