Pac-12 preview: New-look USC is back in contention

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Pac-12 preview: New-look USC is back in contention (2:16)

Ryan McGee previews the Pac-12, where new arrivals Lincoln Riley and Caleb Williams have brought hype back to SoCal, even if Utah seems poised to repeat as conference champs. Plus, this year marks the 125th Big Game between Stanford and Cal. (2:16)