Additions:
P Jeff Locke. The 49ers signed the left-footed Locke, 2013 fifth-round pick of the Vikings, on Monday. With Bradley Pinion signed for just one more season, he becomes at least a candidate if the team can't extend Pinion. Perhaps more significant, he gives Pinion -- who also handles kickoffs -- some relief during the offseason.
RB Jerick McKinnon. The 49ers signed the former Minnesota Vikings running back to a four-year deal Wednesday. He is expected to be the lead back in a rotation that will include former Georgia Southern teammate Breida and others.