Miller says he's dedicating the season to his 6-year-old cousin who recently emerged from a coma after a car accident with his mother and older brother in West Texas.
On Monday, Miller tweeted: "You can post this where ever.. Denver broncos will win the Super Bowl" in the 2013 season. He added hash tags "4UJEREMIAH" and "IGUARANTEEIT58."
The linebacker later told The Associated Press that when the boy, Jeremiah Clark-Martinez, came out of his coma he remembered he had a cousin who played for the Broncos. That inspired Miller to make his pledge.
Miller spoke by phone from New York while on a media tour for AXE skin products.
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