One major move the Las Vegas Raiders made this offseason was upgrading the offensive side of the ball. After watching the Raiders' offense for a season, something had to change, and the front office made that clear. They did a great job of addressing the problem straight out of the gate. The front office went and got one of the best offensive-minded play callers in the NFL, Klint Kubiak, and made him their new head coach. Having an offensive-minded head coach was key for this franchise. Klint Kubiak | Darrell Craig Harris, On SI The Raiders' last few head coaches were on the defensive side of things. But now, the Silver and Black will have someone who will call the offense and ensure they execute at a high level. There are going to be no excuses for the offense next season. This team then went out and fixed their biggest problem, the offensive line. Kubiak knows that if you want to have a successful offense, it all starts in the trenches and getting that right.…