What you need to know when the 49ers (0-3) visit the Arizona Cardinals (1-1):
SITE: University of Phoenix Stadium
KICKOFF: 1:05 p.m.
TV: Fox Ch. 2 (Sam Rosen, David Diehl, Jen Hale)
RADIO: 810AM & 107.7 FM (Ted Robinson, Tim Ryan)
THREE KEYS
1. Sack Carson Palmer. Unable to record a sack in 2 of 3 games, the 49ers have a great opportunity to disrupt the Cardinals’ pass-oriented offense.