The AFL and NFL merged before the start of the 1970 season.
1970
1970 was the first season of the 'new' NFL that combined NFL and AFL teams.
nobody knows
They have all played each other after AFL/NFL merge
The NFL and AFL merged in 1970.
Originally called the Dallas Texans, the chiefs moved to Kansas City and entered the NFL during the NFL-AFL merge in 1970.
1970, the first year of the AFL-NFL merger. Prior to the merger and starting in 1967, there were six divisions in professional football ... 4 in the NFL and 2 in the AFL.
21 times in total if you include the wins before the merge of the NFL/AFL. It is only 19 times if you only count the wins after the merge.
1970, but they entered the AFL in 1960.
Answer1970, but they entered the AFL in 1959.
1970, but they entered the AFL in 1960.
1970; they entered the AFL in 1960.