May 2022 puzzler
Change one letter in the name of an NFL team. Do it again for their main rival. These two words are synonyms of the name of a third NFL team (in the other conference). What teams and words are these?
Note: I added the "main rival" part to disambiguate between the intended answer and a few other possibilities. But if you submit any trio of team names that reasonably fit the rules, I'll count it.