After signing a two-year, $17.6 million deal with the Las Vegas Raiders, Marcus Mariota wants to make sure there is no quarterback controversy.

Mariota insists he's coming in as Derek Carr's backup.

"First and foremost, this is Derek's team, and I understand that," he said.

"I understand that going in. ... My priority going into free agency was to be a part of a team that I felt could bring out the best in me. Whatever happens, whatever comes of that, I'm ready for. But I do know, to play starting quarterback in the NFL, to be at that spot, is not an easy job to do. And I think when it comes down to it, a strong, stable supportive quarterback room makes that job a whole lot easier, and that's what we have to do. And I'm going to do my best to support Derek in every possible way that I can; and along with that, I'm just going to try to become the best player that I can be and see where that takes me."