49ers exercise Arik Armstead's fifth-year option, banking on him
Oregon Ducks In The NFL: 49ers Place Arik Armstead On Injured Reserve
Arik Armstead, 49ers D-Lineman - 49ers Strong Start To the Season
49ers, community benefit big from Arik Armstead's unselfishness
49ers' Arik Armstead focused on winning Super Bowl this time
49ers release Tevin Coleman; Arik Armstead could return vs. Rams
49ers shake up defensive line, keeping Arik Armstead and trading
Arik Armstead fires back at Giants' Kayvon Thibodeaux for trolling
Arik Armstead dishes on new mindset, future of 49ers D-line
Arik Armstead: 49ers can repeat as NFC West champs; Trey Lance has
49ers' Steve Wilks lauds Arik Armstead's versatility, front