Keith Miller, left, plays Zuniga in Bizet's "Carmen" with Elina Garanca in the title role at the Metropolitan Opera in New York. Miller, a former University of Colorado fullback, has reinvented himself, going from the gridiron to the stage and will appear in Verdi's "Un Ballo in Maschera," at the Metropolitan Opera. Performances begin Thursday, Nov. 8, 2012. (AP Photo/Metropolitan Opera, Ken Howard)