By Bill Bradley, contributing Jean Delance Jersey editorThe NHL has seen an unusual outbreak of mumps during the first three months of the season. The i sue hit an apex Saturday when reigning MVP Sidney Crosby of the Pittsburgh Penguins became the 14th player to be officially diagnosed with the disease.The NFL, a similar full-contact sport with the largest rosters in profe sional sports where players spend days together in close quarters, has yet to be hit by the disease, according to the league.In response to questions for a last week, the NFL said:According to the , mumps is a contagious disease that is caused by the mumps virus. into the subject Monday, focusing on Crosby, who already has mi sed three games with the disease. He already had been vaccinated for the disease, including booster shots for playing overseas in the past two Winter Olympics.The CDC said those vaccinations work for about 88 percent of the population.The NFL's biggest locker room i sues have been fighting . The league has been aggre sive about cleansing its facilities and prevent spread of the disease, which isn't always easy for a 53-man roster.Gregory Wallace of the CDC explained for USA Today some of the particulars about mumps. Julian Hicks Jersey