With the addition of the Cincinnati Bengals, the AFL's ten teams were grouped into two divisions. Each team would play a home-and-away game against the other four teams in its division, one game against each of the five teams in the opposite division, and a second game against one of the other division's teams.
The best team in the Eastern Division would play against the best in the Western Division in a championship game. If there was tie in the standings (as happened when Oakland and Kansas City both finished at 12-2-0), a playoff would be held to determine the division winner.