Mind-blowing stat: San Francisco is on pace to allow 520 points this season (would be 2nd-most in history behind the 1981 Baltimore Colts).
Tale of two halves: Colin Kaepernick has a 118.2 passer rating in the first half this year, but a 49.9 rating after halftime.
Bad memories: The last time he played in Arizona (Week 3, 2015), Kaepernick registered the lowest career passer rating as a starter (16.7).