49ers stockpiling picks, including 2013 third

The San Francisco 49ers have added one third-round choice and two sixths, all in 2013, with some wheeling and dealing during the fourth round of the 2012 draft.

Adding future picks could make sense for the 49ers given that they have relatively few roster spots open this season.

More in a bit. The Arizona Cardinals just drafted a tackle, Bobby Massie, from Mississippi, with the 112th overall choice.