The Raiders were narrowly beaten by the Indianapolis Colts at the weekend, despite the quarterback completing 112 rushing yards and 217 passing yards.
The 24-year-old told reporters: "We have a great sheet and I pretty much graded out at about 95% in decision making. So the decisions I made were phenomenal and if I stay doing that, we'll be good, and I believe I will.
"Overall, I have to get the ball out there on that first pick, and on the last one if I had gotten to the spot, we wouldn't even be talking about that, we'd be 1-0, definitely on me.
"I can't sit here and lie, because I'm so competitive I might forget. I just need to get down. I absolutely have to. I've got guys counting on me and I need to get down."
The Raiders play the Jacksonville Jaguars on Sunday.