The rivalry between the Kansas City Chiefs and the Las Vegas Raiders goes back to the formation of the American Football League in 1960, when the Chiefs were the Dallas Texans, and the Raiders resided in Oakland. At no time in that rivalry had both teams faced each other with a record of 3-0 or better until Sunday’s game at Las Vegas’s Allegiant Stadium. An unbeaten record wasn’t entirely surprising for the Chiefs with Patrick Mahomes, but the Raiders? The team won only three games in the whole of last season, but this new Raiders team under Klint Kubiak presents all kinds of challenges for opponents.