Some see weaknesses in Arik Armstead, the 49ers' potential No. 1 pick

Daily 49ers blog for NBC Bay Area website: Oregon defensive lineman Arik Armstead is a big talent physically, but at least one NFL scout believes he's a risk. http://www.nbcbayarea.com/news/sports/Possible-49ers-Target-Armstead-Has-Some-Critics-301100881.html