SANTA CLARA, Calif. -- With the San Francisco 49ers' regular season half over, let's take a look at the impact made by the rookie class:First round: Safety Eric Reid. The 49ers traded up to take Reid at No. 18 and they have not been disappointed. Reid has stepped right in and looks like he's been playing for five years. He rarely makes mistakes and he has shown he is a playmaker. The team does not miss Dashon Goldson, who went to Tampa Bay in free agency.