Voice Doppelgangers
Taylor Twellman and Jesse Palmer have the exact same voice.
If either one got sick with laryngitis or otherwise lost their voice, I would bet that ESPN would have the sick one still appear on air, but lip-sync to the other's dubbed-in voice.
I would love if they appeared together to provide analysis on any sort of sports-related issue, perhaps on concussions in sports, but it could very well lead to a rip in the fabric of space-time.