The backup quarterback featured in four games during the regular season, completing 95 passing yards.
The 23-year-old told USA Today: "I don't even know if words can describe what [quarterbacks coach Greg Knapp has] done for me this season as far as becoming a professional quarterback.
"He's taken me from black to white, white to black, however you want to look at it, and I've grown tremendously because of it.
"I do my best to help the defense out in that aspect, do whatever our staff needs me to do."
The Broncos face the Seattle Seahawks in this weekend's Super Bowl.