By Brian Metzler Tommy Rivers Puzey doesn’t view the 26.2 miles as a race. Instead, the 38-year-old sees it as a celebration of his return to health and progress toward his new goal: to build a body strong enough to fight cancer, if and when it returns. When Tommy Rivers Puzey toes the starting line at the New York City Marathon on Nov. 6, he will once again stand out with the chiseled muscular frame that has always set him apart from the much smaller and leaner physique of the elite marathoners he once competed against. While his physical strength and relentless determination will be on full …