#49ers #PressPass #ArikArmstead The 49ers defensive lineman discussed what went wrong on defense against the Cardinals and how the locker room needs to step up heading into the Week 10 matchup against the Rams. Subscribe to the San Francisco 49ers YT Channel: https://bit.ly/2E2VgFJ For more 49ers videos: https://bit.ly/2U9wau9 For more 49ers action: https://www.49ers.com/ Like us on Facebook: https://www.facebook.com/SANFRANCISCO49ERS/ Follow us on Twitter: https://twitter.com/49ers Follow us on Instagram: https://www.instagram.com/49ers/ Get the App: https://itunes.apple.com/app/id395859078?mt=8