Mostert broke down his performance against the Miami Dolphins, discussed his mindset coming back from a knee injury and spoke about the birth of his second son. #49ers #Mostert #LARvsSF 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