49ers sign Armstead, have whole draft class under contract

The 49ers are the latest team to get their entire 2015 draft class under contract. Arik Armstead, a defensive lineman from Oregon who was San Francisco’s first-round draft pick, signed his deal today. The 49ers signed their other nine picks early this week. The 49ers like Armstead’s promise because he’s a 6-foot-7, 292-pounder who has…