A pair of prominent Breeders' Cup runners add an American flavor to the $143,000 Princess of Wales's Stakes at Newmarket on Thursday. BC Marathon winner Man of Iron makes his second start for new trainer Luca Cumani in the 1 1/2-mile contest, while Spanish Moon, fourth in the Turf, drops into a Group 2 contest after three narrow misses at the top level at far-flung locales around the world.