The Patriots are set to kick if off against the Chiefs on Sunday to decide who gets a trip to Super Bowl LIII in Atlanta come February. Though nobody can be who exactly will win, Wikipedia seems to have some information we don’t.
The database has a list of every conference champion in NFL history, and if you scroll to the 2019 game, Wikipedia has the Patriots has the winner and the Chiefs as the losers.
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You can see the Wikipedia page in full HERE.