The last time that the Denver Broncos beat the Las Vegas Raiders twice in one season was the 2014 season. Not a single Bronco player from that team is currently on the team. In fact only two players from that team are still in the NFL - Von Miller and Brandon McManus.
This also marks the first time that the Broncos have swept the season series with a divisional rival other than the Los Angeles Chargers in a long time. In 2014, the Broncos went 6-0 in the AFC West. Not only was it the last time that they swept the Raiders, it was also the last time that they swept the Kansas City Chiefs.