At 69 and 68 years old, Carroll and Belichick will set the record for the oldest head coach matchup in league history with a combined age of 137 years and 162 days, according to NFL Research.
But who will retire first?
"I don't know," Carroll told reporters earlier in the week. "Ask him. I'm feeling great. I'm kind of on a five-year plan. Five years from now I'll figure it out and reassess. I actually owe that to David Brooks. And he taught me that a while back. Something he wrote, 'Why are you looking year-to-year? Why don't you just plan it out over a five-year period?' So, each year is five more years.”
“So it was five years last and it's five years this year and we'll figure it out when the time comes."
The previous record was 136 years and 117 days when Mary Levy and Don Shula met in 1995.