Peyton Manning can't do this all by himself.
Denver's defense will have to do its part if the Broncos are going to have the special kind of season so many expect of them. Football chief John Elway swapped unconventional quarterback Tim Tebow for the only four-time MVP in NFL history, seeking to add to the two Super Bowl trophies he won during his Hall of Fame playing career.
Besides landing the biggest prize in the free agency era in Manning, the Broncos made several changes on a defense led by former Jacksonville Jaguars head coach Jack Del Rio, Denver's eighth defensive coordinator in eight seasons.
The Broncos will be without leading tackler D.J. Williams to start the season, however, and maybe also Elvis Dumervil.