Mel Kiper Jr. is back with his third 2013 NFL mock draft for the first round.We'll run through the projected picks for NFC West teams, beginning in reverse order and working our way forward. As usual, I'll sample from Kiper's analysis before thoughts.31. Datone Jones, DE, UCLAKiper's give: Justin Smith will be 34 in September, and the 49ers need to think about who could take over for him long term, and spell him in the interim. Jones can provide an interior pass-rushing presence.