From Pro Player Insiders. Check out the entire piece on this link.

The rivalry between the Oakland Raiders and Kansas City Chiefs (originally the Dallas Texans) has always been amongst the most intense in professional football.

And things will be no different this Sunday at Kansas City, where the 5-0 Chiefs take on their longtime adversary and a team that has won its last six games at Arrowhead Stadium.

But let’s go back more than 40 years ago. Somehow it was only fitting that these two proud franchises would put a stamp on a big part of sports history as the 1960s came to a close.