The 25-year-old told reporters: "I've said this before. Pressure, I feel like, comes from lack of preparation.
"This isn't going to be a pressure situation, it is going to be a matter of going out there and performing physically.
"When I first started starting, I was just trying to do well and make sure we were winning games. Things have gone right while we have been playing. We're here."
The 49ers face the Baltimore Ravens in the Super Bowl at the Superdome in New Orleans on Sunday.