In this undated photo provided by the University of Colorado, Keith Miller 

In this undated photo provided by the University of Colorado, Keith Miller rushes down the field as a fullback for the NCAA college football team. Miller has reinvented himself, going from the gridiron to the stage and will appear in Verdi's "Un Ballo in Maschera," at the Metropolitan Opera in New York. Performances begin Thursday, Nov. 8, 2012. (AP Photo/University of Colorado)
Associated Press
In this undated photo provided by the University of Colorado, Keith Miller rushes down the field as a fullback for the NCAA college football team. Miller has reinvented himself, going from the gridiron to the stage and will appear in Verdi's "Un Ballo in Maschera," at the Metropolitan Opera in New York. Performances begin Thursday, Nov. 8, 2012. (AP Photo/University of Colorado)
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