[16][17] The rivalry did not become so apparent until the Kansas City Athletics baseball team moved to Oakland, California, in 1968.

The following year, in 1969, the Raiders beat the Chiefs twice in the regular season[18][19] and went on to win the AFL Western Conference title.

[18][19] The Chiefs participated in Super Bowl IV a week later and defeated the NFL's heavily favored Minnesota Vikings.

Chiefs quarterback Len Dawson rolled right and gained enough yardage for a first down, and as he fell to the ground, Raiders defensive end Ben Davidson dove into Dawson with his helmet; in retaliation, Davidson was attacked by Chiefs wide receiver Otis Taylor.

[9][21] After a bench-clearing brawl, Davidson and Taylor were ejected, and the penalties that were called nullified the first down under the rules at the time.

The Raiders took advantage, as George Blanda made a 48-yard field goal with 8 seconds left to secure a 17–17 tie.

Due to this incident, the NFL changed the rules so that Davidson's personal foul would have been enforced at the end of the play, and Taylor's penalty would have been assessed only after the Chiefs had been awarded a first down.

After the game, Raiders coach John Madden said "We couldn't beat the Chiefs, but we damn near killed their horse."

[22] The Raiders won two more Super Bowl titles in 1980[23] and 1983[24] while the Chiefs were considered to be one of the worst teams in the NFL.

On November 25, 2007, the Raiders defeated the Chiefs in Arrowhead for Oakland's first victory over Kansas City since December 23, 2002.

On January 2, 2011, the Raiders defeated the Chiefs in Kansas City for the fourth straight time, 31–10, to finish a sweep of the AFC West.

With 1:07 left in the game, Derek Carr threw a touchdown pass to Jason Witten to give the Raiders a 31–28 lead, but Patrick Mahomes lead a 75-yard drive culminating in a 23-yard touchdown pass to Travis Kelce with 28 seconds left that gave the Chiefs a 35–31 win, officially renewing a spark in the rivalry between the two teams.