A typically reserved Todd Helton lost control of his emotions, throwing his hands in the air and jumping around as he circled the bases. Leave it to a walk-off homer to bring out the kid in a veteran player. Helton hit a two-out, two-run homer off closer J.J. Putz in the bottom of the ninth inning and the Colorado Rockies rallied for an 8-7 win over the Arizona Diamondbacks on a rain-soaked Saturday night.