3)When the offensive staff led by coordinator Bill Musgrave took over, it didn't hand Carr a completely new playbook. Some of the terminology is new, some plays are new, but the coaches have attempted to blend in what worked last year with what they think will work this year. This staff has been wowed by how receptive the second-year passer is to learning himself -- and then teaching others. Though a minor finger injury stopped him from throwing most of the spring, his mental focus has impressed. What you likely will see from Carr is more willingness to throw downfield. The middle of his line was solidified in free agency with center Rodney Hudson, and the offense's big-play potential grew with the additions of Amari Cooper and Michael Crabtree. Carr won't have to check down as much.