And how about Richard Sherman from WR to CB?
Richardson was selected 45th with the intention of making him a kick returner. In college he had as many combined kickoff returns/punt returns as he did touchdown passes: 1.
The Seahawks also had that college bball player from Bradley about 10/15 years ago. And Antio Gates and Stephen Neal have had solid NFL careers despite not being drafted for their primary positions (power forward and wrestler).
Do I need to explain the difference between a 5th round and 1st round pick?