Keith Miller waits for the ball snap as a fullback for the school's NCAA college football team at the University of Colorado. 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. (AP Photo/University of Colorado)

Keith Miller waits for the ball snap as a fullback for the school's NCAA college football team at the University of Colorado. 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. (AP Photo/University of Colorado)