49ers vs Cardinals preview: Time to get serious

The 49ers, coming off of a necessary win against the Patriots, now face an up-and-down Cardinals team that could give Kyle Shanahan's club problems if they allow it. Rob talks injuries, Brock Purdy's steady ascension and how San Francisco can be successful against Arizona. The Striking Gold podcast is brought to you by Prize Picks. Learn more about your ad choices. Visit podcastchoices.com/adchoices